252 Mercedes (W201) 2.5-16 Cosworth (1991) DUK 3 F

Mercedes 190E 2.5-16 Cosworth (1988-93) Engine 2497cc S4 16v OC

Registration Number DUK 3 F (Cherished number, originally allocated for issue c.1968, from Wolverhampton)
MERCEDES SET

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Sights at Stuttgart were lowered and aimed squarely at the the lucrative market occupied by the smaller BMW;'s

Mercedes spent over £600 million researching and developing the 190 and subsequently said it was 'massively over-engineered'. The W201-based 190 was introduced in November 1982.

In the UK the 190 was seen as a model with less sporting appeal but more prestige than BMW.

In order to redress this perception Mercedes wished to take the 190 E rallying, and asked British engineering company Cosworth to develop an engine with 320 bhp (239 kW) for the rally car. This project was known as project WAA' by Cosworth.

During this time, the Audi Quattro with its all-wheel drive and turbocharger was launched, making the 2.3-16v appear outclassed. With a continued desire to compete in high-profile motor sport with the 190, and also now an engine to do it with, Mercedes turned to the Deutsche Tourenwagen Meisterschaft (DTM) (German Touring Car Championship) motor sport series instead. Cars racing in this championship, however, had to be based on a roadgoing model. Mercedes therefore had to put into series production a 190 fitted with a detuned version of the Cosworth engine. This high-performance model was known as the 190 E 2.3-16, and debuted at the Frankfurt Auto Show in September 1983, after its reputation had already been established. Three cars, only slightly cosmetically altered, had set three world records in August at the Nardo testing facility in Italy, recording a combined average speed of 154.06 mph.

The Cosworth engine was based on the M102 four cylinder 2.3-litre 8-valve 136 hp (101 kW) unit already fitted to the 190- and E-Class series. Cosworth developed the cylinder head, "applying knowledge we've learnt from the DFV and BDA. It was made from light alloy using Coscast's unique casting process and brought with it dual overhead camshafts and four valves per cylinder, meaning 16 valves total which were developed to be the largest that could practically be fitted into the combustion chamber In roadgoing trim,
the 2.3 L 16-valve engine made 185 hp.

An enlarged 2.5 L engine replaced the 2.3 L in 1988. It offered double-row timing chains to fix the easily snapping single chains on early 2.3 engines, and increased peak output by 17 hp and a slight increase in torque. For the European market without catalyst (RÜF) the car delivered 204 bhp Catalyst equipped 2.5-16s produced a slightly reduced 197 bhp. It is debated whether the 2.5 L engine was developed and built by Mercedes or Cosworth. However some cylinder heads from 2.5 L cars are stamped with the Coscast logo indicating they were cast at Cosworth's foundry just like the 2.3s

Diolch am 88,522,342 o olygfeydd anhygoel, mae pob un yn cael ei werthfawrogi'n fawr.

Thanks for 88,522,342 amazing views, every one is greatly appreciated.

Shot 10.10.2021 at Bicester Scramble, Bicester, Oxon. Ref. 122-252

Taken in: UK / England / Cherwell District / Caversfield (show map)

Taken on: October 10, 2021

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Camera: Canon EOS 100D, f/9.0, 1/200 sec, 28mm, ISO 100 (more info) (hide info)

Camera:	Canon EOS 100D
Aperture:	f/9.0
Exposure Time:	0.005 sec (1/200)
Focal Length:	28mm
ISO:	100
Exposure Bias:	0 EV
Flash:	No Flash
Exposure Program:	Program AE
Exposure Mode:	Auto
Metering Mode:	Multi-segment
White Balance:	Auto
Color Space:	sRGB
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