Evo II is a complete different animal compared to the EVO I or any of the Cosworths. The 2.5-16V engine funnily enough shares almost the same engine architecture as the 2.3-16V Cosworth, as it is a short stroke which allows it to rev even higher 1000rpm compared to the EVO I.
The EVO II gives about 231bhp (181ft-Ib) compared to the 204bhp (177ft-Ib) on the EVO I.
Both use the KE-Jetronic fuel Injection
Weight:
EVO I - 1320kg
EVO II - 1340kg
Both EVO's had full SLS suspension which the driver could adjust the ride height from an interior switch.
Here's some more info...
With the debut of the BMW M3 Sport Evolution, Mercedes' direct competitor, it became obvious that the 2.5-16 needed a boost for the circuit. In March 1989, the 190 E 2.5-16 Evolution debuted at the Geneva Auto Show.
The Evo I, as it came to be called, had a new spoiler and wider wheel arches. Many changes were to under-the-skin components such as brakes and suspension. There was a full SLS suspension allowing vehicle ride height to be adjusted from an interior switch. All were intended to allow the Evolution cars to be even more effective round a track.
The Evo I's output similar to the 202 bhp (151 kW) of the "regular" 2.5-16. However this car had a redesigned engine of similar capacity but, most importantly, a shorter stroke and bigger bore which would allow for a higher rev limit and improved top-end power capabilities. Additional changes stretch to "rotating masses lightened, lubrication improved and cam timing altered"
http://en.wikipedia.org/wiki/Mercedes-Benz_W201#cite_note-practical_classics-6. Cosworth also list a project code "WAC" for the development of the short-stroke Evolution engine
http://en.wikipedia.org/wiki/Mercedes-Benz_W201#cite_note-cosworth-2http://en.wikipedia.org/wiki/Mercedes-Benz_W201#cite_note-cosworth_type_reference-5.
Only 502 units of the Evolution model were produced for homologation in compliance with DTM rules. For those customers desiring even more performance, a PowerPack option engineered by AMG
http://en.wikipedia.org/wiki/Mercedes-AMG was available for DM 18,000. The PowerPack option included hotter camshafts, a larger diameter throttle body, more aggressive ignition and fuel management as well as optimization of the intake and exhaust systems. The net result was an additional 30 bhp (22 kW).
In March 1990, at the Geneva Auto Show
http://en.wikipedia.org/wiki/Geneva_Auto_Show, the 190 E 2.5-16 Evolution II was shown. With the success of the first Evolution model, this model's 502-unit production was already sold before it was unveiled. This car retailed in 1990 for
USD $80,000.
The "Evo II" included the AMG PowerPack fitted to the same short stroke 2.5 engine as the Evolution, as well as a full SLS suspension allowing vehicle ride height to be adjusted from an interior switch. An obvious modification to the Evolution II is a radical body kit (designed by Prof. Richard Eppler from the University of Stuttgart) with a large adjustable rear wing, rear window spoiler, and Evolution II 17 inch wheels. The kit served an aerodynamic purpose — it was wind tunnel tested to reduce drag to 0.29, while at the same time increasing downforce. Period anecdotes tell of a BMW executive who was quoted as saying "if that rear wing works, we'll have to redesign our wind tunnel." The anecdote claims that BMW did.
As mentioned 502 were made in "blauschwarz" blue/black metallic. But the last two, numbers 501 and 502 were made in astral silver.
Even more interesting info....
AMG Power Pack
Available only to 2.5-16 and Evolution I models, optional AMG Power Pack increased power to 224 bhp (166
kW) at 7,200
rpm and
torque to 181 lb·ft (245 N·m) at 5,000 rpm, whilst pushing the top speed up to 155
mph. In their final incarnations, these engines produced up to 350 bhp (260 kW) in racing tune.
More interesting facts...
In 1983, from August 13-21 the 190E 2.3-16V (yup, the Cosworth-built head), broke three FIA world records by driving 31,068 miles at maximum speed of 153 mph in the Nardo Ring Testing Facility in Italy. (20 second pit stops every two hours) in a total of 201 hours, 39 minutes, and 43 seconds.
This was the time when mercedes engineers were allowed to go "free" with the design.
Interestingly enough, if you do a search on on Mercedes doing the testing at the Nardo Ring with the 190E 2.3-16V, you won't find any detailed information or records (apart from 1 or 2 sites just giving very breif information). This is due to the fact that Mercedes themselves kept this information from the press/media as the development of the 2.3-16V engine with the 190E body was so successfull and "over-engineered", that it could have perhaps jeopordized the sales of the other Mercedes Benz models/line ups.
rolleyes
...
