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If you want to know more about the sm google and you will know the sm is a stunning part of history
In 1961. Citroën began work on 'Project S' — a sports variant of the revolutionary Citroën DS. As was customary for the firm. many running concept vehicles were developed. increasingly complex and upmarket from the DS. Citroën purchased Maserati in 1968 with the intention of harnessing Maserati's high-performance engine technology to produce a true Gran Turismo car. combining the sophisticated Citroën suspension with a Maserati V6. 
The result was the Citroën SM. first shown at the Geneva Motor Show in March 1970. It went on sale in France in September of that year. Factory produced cars were all left-hand-drive. although RHD conversions were done in the UK and Australia.
The thriving French luxury car industry was decimated by post-World War II puissance fiscale regulation. which has hamstrung French manufacturers for decades. so France had not had a production vehicle in this segment after World War II.  The SM had an unusually small engine of 2. 7 liters due to these regulations; it was the first response to the luxury/performance sector since the export oriented Chrysler V8 engine Facel Vega in the late 1950s.  Citroën's flagship vehicle competed with high-performance GTs of the time from other nations and manufacturers. such as Jaguar. nbsp;Lotus. nbsp;Ferrari. nbsp;Aston Martin. nbsp;Alfa Romeo. nbsp;Mercedes-Benz. and Porsche.
The origin of the model name 'SM' is not completely clear. The 'S' may derive from the Project 'S' designation. the aim of which was to produce what is essentially a sports variant of the Citroën DS. and the 'M' perhaps refers to Maserati. hence SM is often assumed to stand for "Systeme Maserati" or "Sports Maserati". Another common alternative is Série Maserati. a rel="rel nofollow" href="https://en. wikipedia. org/wiki/Citro%C3%ABn_SM#cite_note-6" > but others have suggested it is short for 'Sa Majesté' (Her Majesty in French). which aligns with the common DS model's nickname 'La déesse' (The Goddess).
The SM did not find a sufficient customer base in the European GT market. but much of the SM's technology was carried forward to the successful Citroën CX. launched in 1974 the DIRAVI steering being the most obvious example. The same basic engine in enlarged 3. 0 L form (some in Italy had 2. 0 L) was used in Maserati's own Merak (1. 00 units) and later with some modification in the Biturbo (40. 00 units).  The Merak. nbsp;Khamsin. and Bora. used Citroën's high-pressure hydraulics for some functions. and the Citroën gearbox in the Merak. during the Citroën-Maserati alliance.
Contemporary automotive journalists were effusive about the SM's dynamic qualities. which were unlike anything they had experienced before.  The SM provided a combination of comfort. sharp handling. and braking not available in any other car at the time.  The magazine Popular Science noted that the SM had the shortest stopping distance of any car they had tested. 
Automotive journalists marveled at the resulting ability to travel for hours at 200 km/h (120 mph) in comfort.  In 1972 Motorsport (U. K. ) noted . "that rare quality of being a nice car to be in at any speed. from stationary to maximum. "  The touring range based on the SM's fuel economy and the large 90 l (20 imp gal; 24 US gal) fuel tank made long. fast. relaxing journeys possible. 
Because the SM had a small 170 PS (130 kW) engine. the acceleration was adequate rather than exemplary - some competitors were quicker. Some owners have fitted the similar sized 220 PS (160 kW) Maserati Merak SS engine. which does improve the driving experience considerably. 
Fuel consumption compares favorably to most competitors.Performance against competitorsMake & modelHorsepower 'SAE net'Top speedAcceleration 0 to 60 mphFuel economyCitroën SM170 PS (130 kW)220 km/h (140 mph)8. 5 sec8 km/l (23 mpg‑imp; 19 mpg‑US) Mercedes-Benz 450 SLC192 PS (141 kW)202 km/h (126 mph)9. 5 sec6. 5 km/l (18 mpg‑imp; 15 mpg‑US) Jensen Interceptor254 PS (187 kW)217 km/h (135 mph)7. 5 sec4. 4 km/l (12 mpg‑imp; 10 mpg‑US) BMW 3. 0CS193 PS (142 kW)200 km/h (120 mph)7. 9 sec7. 6 km/l (21 mpg‑imp; 18 mpg‑US) Jaguar XKE Series III V12254 PS (187 kW)217 km/h (135 mph)6. 8 sec5. 5 km/l (16 mpg‑imp; 13 mpg‑US) Lincoln Continental Mark IV215 PS (158 kW)190 km/h (120 mph)10. 8 sec4. 8 km/l (14 mpg‑imp; 11 mpg‑US) Cadillac Eldorado238 PS (175 kW)189 km/h (117 mph)9. 7 sec4 km/l (11 mpg‑imp; 9. 4 mpg‑US) Technical innovations
The SM combines many unusual and innovative features. some of which are only just becoming commonplace on cars of today.  It borrows heavily from the innovations introduced on the DS. by including hydro-pneumatic (oleo pneumatic) self-leveling suspension. and self-leveling lights that swiveled with the steering (except in the USA where these were illegal at the time).
The SM was Citroën's way of demonstrating just how much power and performance could be accommodated in a front-wheel drive design. This was novel. and many technical issues needed to be overcome. especially related to torque steer. where excessive steering feedback impacts control of the vehicle.
A solution was found - no road feedback at all - the driver points and goes. regardless of what the driven wheels are experiencing.  Hitting a pothole at high speed would not turn the steering wheel in the driver's hands.Tailgate open - carbon-reinforced resin wheels
This new type of variable assist power steering has since spread throughout the vehicle population.  DIRAVI as it was called. allowed great assistance to the motorist while parking. but little assistance at motorway speeds. The system adjusts the hydraulic pressure on the steering centering cam according to vehicle speed so that the amount of steering feel remained almost constant at any speed. counteracting the tendency of manual and ordinary power assisted steering to feel light at high speed. Thus the car turns easily at low speed. emphasized by high gearing given two turns lock-lock. and relatively more effort is required at higher speed.
If the driver released the steering wheel. then the steering would center back to the straight ahead position. It was geared for minimal steering input - with 2 turns from lock to lock. often described as like a go kart.
Many contemporary reviewers remarked that this system would take at least 50 mi (80 km) of driving to become familiar. but once the driver is accustomed to the system. then traditional steering feels old-fashioned. 
This steering was controversial at the time - exaggerated strong-arm steering inputs required for contemporary cars could cause abrupt manoeuvres in the SM. When the SM was cast as a TV series regular on 1972's The Protectors. the lead actress refused to drive it. because of the familiarization required from the steering. 
The DIRAVI steering is self-centering and fully powered (as opposed to hydraulically assisted). This feature allows the front wheels to run near-zero caster. and means that there is no camber change as lock is applied. and also ensures that the maximum amount of tyre area is in contact with the road at all times.
The wiper mechanism. when on the "low speed" setting. is 'sensitive' to rain. by measuring the current needed to drive the wiper motor. while the steering column is adjustable in both height and reach. 
The braking system. adapted from the DS. employs disc brakes at all four corners (the DS has drums at the rear). with the front brakes being inboard. and cooled via large ducts on the front underside of the car. The hydraulic braking pressure front to rear balance is self-adjusting according to the weight in the rear of the car. so on hard braking the entire car lowers evenly. 
Standard wheels are steel with stainless trims. but for the rigors of off-road racing. nbsp;Michelin developed a unique solution - a lightweight carbon-reinforced resin wheel. which became a factory fitted option. These plastic wheels weigh less than half the standard weight and were decades in advance of similar applications. The construction method is similar to more the brittle fiberglass material (some hobbyists even refer to them this way ). but the wheels contain carbon fibers. not glass fibers. Styling
Designed in-house by Citroën's chief designer Robert Opron. the SM bears a vague family resemblance to both the DS and the Maserati Mistral. Like the DS. the SM retains the rear-wheel spats. and seen from above. the SM resembles a teardrop. with a wide front track tapering to a narrower rear track.
The SM was unusually aerodynamic for its era. with Kamm tail and low drag coefficient of 0. 26.  The ventilation intake is located in a "neutral" area on the hood. which makes the ventilator fan regulate the interior ventilation at all road speeds.The SM in profileMaserati MistralThe SM interior
With its distinctly modernist influence. the interior styling of the SM is as dramatic as the exterior. The small oval steering wheel is matched by oval gauges. The manual shift lever 'boot' is a highly stylized chrome gate. The seats are highly adjustable buckets with centre padding composed of many individual 'rolls'. High-quality materials are used throughout. The bonnet is aircraft grade aluminum. while the external bright work is stainless steel. rather than ‘cheaper' chrome (except for "plastichrome" "SM" trim at the rear base of the rain gutter).
In 1970. it was a car of the future and the fastest front-wheel-drive car. with a factory-quoted top speed of 220 km/h (140 mph). and independent tests achieving as much as 235 km/h (146 mph). It was an example of the car as a symbol of optimism and progressive technology. similar to the SM's contemporary. the Concorde aircraft. 
The SM's design placed eleventh on Automobile Magazine's 2005 "100 Coolest Cars" listing.MotorsportBreadvan short-wheelbase racing variant
The SM won its first competitive outing. the gruelling 1971 Rallye du Maroc. Citroën continued rallying the SM. eventually developing a "breadvan" short-wheelbase racing variant.
SM World. a marque specialist in Los Angeles. California. produced a turbocharged SM. which in 1987 set the land speed record for production vehicles in its class at the Bonneville Salt Flats. Utah — traveling 202 mph (325 km/h). US exportsA US-spec Citroën SM with round headlamps. The unusual looking green balls are suspension components.
The main export market for the SM was the U. S. In the U. S. . the market for personal luxury cars was much larger than in Europe. with competitors like the Cadillac Eldorado. nbsp;Lincoln Mark IV and Ford Thunderbird alongside a large selection of Italian. British. and German imports. Nevertheless. the unique design of the SM made quite a splash and won the Motor Trend magazine Car of the Year award in 1972: unheard of for a non-US vehicle at the time. 
The SM's six headlight set up was illegal in the U. S. at the time and consequently. U. S. specification cars were fitted with four fixed round exposed lamps. Also. the separate glass windshields of the headlights were illegal in the USA after 1967. which is why the DS did not get them on USA cars when it was restyled for 1968. and the VW Beetle and Vanagon/Kombi and Jaguar E-Type lost their headlight glass windshields at the same time. 
Despite initial success. U. S. sales ceased suddenly — Citroën expected. but did not receive. an exemption for the 1974 model year 5 mph (8. 0 km/h) bumper regulation imposed by the NHTSA. The integral variable height suspension of the SM made compliance impossible. The final batch of 134 now illegal 1974 U. S. model SMs was shipped to Japan. Engines
The SM was sold with a small. lightweight engine in various forms. designed from scratch by Giulio Alfieri but capable of being assembled on existing V8 tooling. Because of this. the engine sported an unusual 90° angle between cylinder banks — a trait shared with the later PRV V6. It was a very compact and innovative design that allowed the use of just one pattern for the cylinder heads and an intermediate shaft extended out to drive the auxiliaries.
PS SAE netTransmission/
productionNumber producedSM 2. 7type SBC114-12. 703 Weber carburetors
42DCNF170M/51. 4502201970-727. 133SM 2. 7 Automatiquetype SBC114-13 Weber carburetors
42DCNF170A/31. 4802051972675SM 2. 7 Injectiontype SCC114-3Electronic Injection
Bosch D-Jetronic178M/51. 4902281972-753. 500SM 3. 0type SDC114-112. 653 Weber carburetors
42DCNF180M/51. 4502251973600SM 3. 0 Automatiquetype SDC114-113 Weber carburetors
42DCNF180A/31. 4802051973-751. 012Twin Turbo V6 SM developed by SM World in Los Angeles. California - achieved 202 mph (325 km/h) at Bonneville Salt Flats
One SM had a Maserati V8 motor - this was a heavily used test bed developed by Maserati for the 1974 Maserati Quattroporte II.  Despite developing 260 hp (190 kW). the car required relatively modest adjustments. and the performance made the SM into a true sporting car. 
The engine was also used in the Maserati Merak from 1972 to 1982. Later versions of the Merak SS had much larger valves and developed 220 hp (160 kW). The Ligier JS2 sports car also used this V6 engine. The final SMs were produced in the Ligier factory in Vichy.Demise
While the oil shock certainly affected sales. it is useful to note that many far more profligate cars were introduced at the same time the SM ceased production. including the hydropneumatically suspended Mercedes-Benz 450SEL 6. 9. Peugeot even introduced a V6 powered car of similar displacement and fuel consumption in 1975. the 604. In the U. S. (the main export market for the SM). the SM was actually an economical vehicle relative to its competitors.  However. the U. S. National Highway Traffic Safety Administration (NHTSA) imposed new automotive design regulations in 1974. effectively banning the Citroën from the U. S. market.
As illustrated under production numbers. SM sales declined starting in 1972. This appears to be attributable to maintenance issues. Like an exotic Italian car. the Weber carburetors require frequent adjustment. Many engines experienced failure at 60. 00 km - it was unclear to most owners that the interference engine design has timing chains that require manual adjustment. an issue not corrected until long after production ceased.  The 90° engine timing was unfamiliar to mechanics in the 1970s. Only Buick (1962–66; 1975-) and Jeep (1966–71) used a V6 with 90° between banks of cylinders. Another issue that has been resolved with retrofit was unreliable ignition breaker cassettes.
Most vehicles require only generalist maintenance. where any competent mechanic can properly maintain the vehicle. Certain vehicles — like Citroëns and Ferraris — require specialist care due to their unique design.  While a sturdy car if maintained rigorously. the SM did require two sets of specialist care — Citroën specialists. which are widespread in Europe. and a rarer Maserati specialist. to keep the engine in tune.  Once potential buyers began to realize this. sales dropped precipitously.
The Quai André-Citroën factory on the banks of the Seine River in Paris closed in 1974. Both the DS and the SM had to find new manufacturing facilities. The final DS models were built at the new Aulnay-sous-Bois factory. while the SM was built by the Ligier company.
Components of the SM lived on — in the Maserati Merak (engine. transmission) and the Lotus Esprit (transmission (both mirror image)). The successful Citroën CX carried forward most of the SM's dynamic qualities. including the trendsetting speed sensitive power steering.Production numbers
A total of 12. 20 SMs were produced during its lifetime. Sales declined steeply each year following the first full year of production. The North American market took 2. 00 cars. in 1972 and 1973. YearEurope/Asia/Middle East/AfricaSales ChangeU. S. and Canada>>TOTAL>>1970868-086819714. 88475%04. 8819722. 86(44%)1. 504. 3619731. 69(47%)1. 502. 191974294(80%)02941975115(61%)0115Variants1972 Citroën SM présidentielle - inaugural drive by Georges Pompidou and Queen Elizabeth II1975 Citroën SM Mylord - sold at auction in 2014 for €548. 20 (US$754. 20)1974 Citroën SM Opéra
French Presidents from Georges Pompidou to Jacques Chirac have enjoyed touring Paris in the two 4-door convertible Citroën SM présidentielle models. sharing them with such notables as Queen Elizabeth II and Pope John Paul II. These manual transmission cars have special low gearing suitable for parade use.
Chapron also created five convertibles (SM Mylord) and seven sedans (SM Opéra). Original copies of these rare models are very valuable - the last MyLord sale recorded was for €548. 20 in February 2014.  Some SM owners have made their own copies of the SM convertible in particular.  Unlike the DS. the factory never authorized a convertible model. as Citroën felt the roof was integral to the structure of the SM.  On the SM. the roof and rear quarter panels were welded on.
Just before the SM's demise. Citroën produced several short-wheelbase racing versions with squared-off rear sections and highly tuned engines — known as the "breadvan" model.
In the UK. three official RHD prototypes were constructed by Middleton Motors. a Citroën dealer in Hertfordshire. England. At least one of these prototypes still survives.
In Australia. 12 cars were converted to RHD by Chappel Engineering in Melbourne. Australia for Dutton's (the Australian importer of Citroën at the time).  Cars are still being modified with RHD controls and dashboards for the Australian market. where RHD is mandatory.
In the spring of 1974. Maserati created a special 260 hp (190 kW) 4. 0 L V8 engine based on the latest C114-11 engine variant. This engine. installed in a standard SM. tested over 12. 00 kilometers. The engine was then removed and preserved. while the rest of the car was destroyed by Alejandro de Tomaso. The SM Club of France created an exact replica of this car using the actual engine from the original and displayed it at the Rétromobile 2010 show. 
Unfortunately. the intended recipient never received this V8. The Maserati Quattroporte II was a Maserati-badged. four-door variant of the SM with an angular body and lengthened floorpan. The six headlights were retained and the later 'SS' version of the engine fitted. This model was introduced at the time of Citroën's bankruptcy in 1974. It entered production in 1976 and only twelve were produced between then and 1978. Prominent ownersThe dramatic dashboard was shared with the Maserati Merak
Like the Citroën DS. the SM has had many celebrity owners.  General Secretary of the Communist Party of the USSRLeonid Brezhnev. a rel="rel nofollow" href="https://en. wikipedia. org/wiki/Citro%C3%ABn_SM#cite_note-52" > Rolling Stones bassist Bill Wyman. a rel="rel nofollow" href="https://en. wikipedia. org/wiki/Citro%C3%ABn_SM#cite_note-53" > Adam Clayton of the rock group U2. a rel="rel nofollow" href="https://en. wikipedia. org/wiki/Citro%C3%ABn_SM#cite_note-54" > and Emperor Haile Selassie I of Ethiopia each drove SMs. while Ugandan dictator Idi Amin had seven of them.  The Shah of Iran drove an SM.
Actors Lorne Greene and Lee Majors. composer John Williams. author Graham Greene. and former Mauritian QC and Politician Sir Gaetan Duval (1930–1996). football player Johan Cruijff. drummer Charlie Watts. nbsp;Cheech & Chong's Cheech Marin and Thomas Chong. a rel="rel nofollow" href="https://en. wikipedia. org/wiki/Citro%C3%ABn_SM#cite_note-56" > motorcycle racer Mike Hailwood. a rel="rel nofollow" href="https://en. wikipedia. org/wiki/Citro%C3%ABn_SM#cite_note-57" > composer John Barry. & musician Carlos Santana. all owned SMs as well.  Popular Yugoslav and Croatian singer Mišo Kovač had his very own golden SM. Television host and comedian Jay Leno's SM is seen frequently in the background of his Jay Leno's Garage YouTube videos. Media appearances
The SM has made prominent appearances in several films and TV series:Burt Reynolds escapes a fleet of police cars behind the wheel of a stolen SM in the 1974 film The Longest Yard. As he leaves the house. the female owner of the SM shouts "don't take my Maserati!".  At a quayside. Reynolds gets out of the. nudges it into gear. and it drives into the water. In real life. Reynolds liked the car so much that he gave a 1973 SM Automatique to his friend Dinah Shore. Janet Jackson appears in an SM with a red leather interior in the music video for the 1998 song I Get Lonely from the Velvet Rope album. Patrick McGoohan drives an SM in a 1975 episode of the American television series Columbo ("Identity Crisis". Season 5. Episode 3)Gerry Anderson's 1971 television series The Protectors featured a platinum blue SM. The SM makes an appearance a gangster-vehicle (also used in a abduction by) in Episode 47 "Die Rechnung wird nachgeliefert" of the successful German crime series Tatort. In the 1980 Spanish film "Navajeros". which tells the story of a famous mid 70s juvenile delinquent nicknamed "El Jaro". the main actor (José Luis Manzano). steals a Citroën SM in order to impress a girl (Verónica Castro). Ben Stiller is kidnapped in a green SM in the 2001 film Zoolander. An SM is used in an attempted kidnapping in the 1975 Charles Bronson film Breakout. Sven Väth and Miss Kittin drive a modified Citroën SM in their video from the single "Je t'aime. moi non plus". Norwegian composer Kaada and his music video 'No You Don't' features an SM. 2013 videogame Grand Theft Auto V features a fictional car named the Lampadati Pigalle. part of the "I am not a hipster" update. which is loosely based on the SM.
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