Ford Sierra RS Cosworth Review William Woollard drives the 150mph Sierra Top Gear 1986

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The Ford Sierra RS Cosworth is a high-performance version of the Ford Sierra that was built by Ford Europe from 1986 to 1992. It was the result of a Ford Motorsport project with the purpose of producing an outright winner for Group A racing in Europe.
The project was defined by Stuart Turner in the spring of 1983. He had recently been appointed head of Ford Motorsport in Europe, and he realised right away that Ford was no longer competitive in this area.
Turner got in touch with Walter Hayes, at the time the vice-president of public relations at Ford, to get support for the project. Hayes had earlier been the driving force behind the development of the Ford GT40 that won Le Mans in 1966, and the Cosworth DFV engine that brought Ford 154 victories and 12 world championships in Formula One during the 1960s and 1970s. Hayes found the project very appealing and promised his full support.
Turner then invited Ken Kohrs, vice-president of development, to visit Ford's longtime partner, the automotive company Cosworth, where they were presented a project developed on Cosworth's own initiative, the YAA engine. This was a twin cam, 16-valve engine based on Ford's own T88 engine block, better known as the Pinto. This prototype proved an almost ideal basis for the engine Turner needed to power his Group A winner.
Therefore, an official request for a turbocharged version (designated Cosworth YBB) capable of 180 HP on the street and 300 HP in race trim, was placed. Cosworth answered positively, but they put up two conditions: the engine would produce not less than 150 kW (204 HP) in the street version, and Ford had to accept no fewer than 15,000 engines. Turner's project would only need about 5,000 engines, but Ford nevertheless accepted the conditions. The extra 10,000 engines would later become one of the reasons Ford also chose to develop a four-door, second generation, Sierra RS Cosworth.
To find a suitable gearbox proved more challenging. The Borg-Warner T5, also used in the Ford Mustang, was chosen, but the higher revving nature of the Sierra caused some problems. Eventually Borg-Warner set up a dedicated production line for the gearboxes to be used in the Sierra RS Cosworth.
Many of the suspension differences between the standard Sierra and the Cosworth attributed their development to what was learned from racing the turbocharged Jack Roush IMSA Merkur XR4Ti in America and Andy Rouse's successful campaign of the 1985 British Saloon Car Championship. Much of Ford's external documentation for customer race preparation indicated "developed for the XR4Ti" when describing parts that were Sierra Cosworth specific.
Roush's suspension and aerodynamics engineering for the IMSA cars was excellent feedback for Ford. Some production parts from the XR4Ti made their way into the Cosworth such as the speedometer with integral boost gauge and the motorsport 909 chassis stiffening plates.
In April 1983, Turner's team decided on the Sierra as a basis for their project. The Sierra filled the requirements for rear wheel drive and decent aerodynamic drag. A racing version could also help to improve the poor, and somewhat undeserved, reputation that the Sierra had earned since its introduction in 1982.
Lothar Pinske, responsible for the car's bodywork, demanded carte blanche when it came to appearance in order to make the car stable at high speed. Experience had shown that the Sierra hatchback body generated significant aerodynamic lift even at relatively moderate speed.
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Ford Sierra RS Cosworth | 150mph | Rod Mansfeild | SVE 🚙
Includes an interview with Rod Mansfeild, Ford of Europe Head of Special Vehicle Engineering.
Old Top Gear 1986 - Ford Sierra RS Cosworth review

[@stage3muppet]

He pulled off in it like my nan ffs 😂😂😂
R.I.P clutch

[@Troub11]

Anyone smell clutch??

[@garyhall4449]

Still my favourite car..👍

[@christineayres7199]

This is the GOAT only thing fast was the Lotus Carlton when that came out but that was a very rare car compared to the Sierra Cosworth which was made in greater numbers 150mph was like 200mph in 2023 terms

[@robertallen3441]

£16,000 pounds, i'll take a dozen please.

[@xsduprwd3937]

Just adding the finishing touches to my time machine now..

[@ewarwoowar7931]

Probably the most iconic car of the 80's

[@d0683]

These old ford cosworths reek of nostalgia

[@Nickbaldeagle02]

Imagine if you could teleport a Tesla Model 3 performance back to the and tell Bill to put his foot down. He'd be blown away.
My diesel BMW X1 is as fast as this and is getting 42mpg. Amazing how far we've come.

[@maxsager139]

this car need v8, 2.0 turbo is trash

[@kells77]

You American fuk
V8 shite this engine is a legend

[@SA-zoom1]

Yeah needs a V8, even though it was the most successful race car ever made 🙄 with a humble 2 litre engine in tuned form was making 550bhp in the track.

[@W42PZ]

Rough engine, loadsa body roll, I’ll take an Integrale thank you.

[@twincammikev]

Yeah right...the cosworth would eat that crap integrale off the road...

[@Shane-zx4ps]

W42PZ the integra would destroy the cosworth in every way. And would keep going forever

[@cossiefordman720]

Integrale is Italian scrap metal, plagued with issues hence it being the last powerful Lancia, this Cossie might have issues but a 4x4 Sapphire would kill it easily