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1990 BMW M3 Sport Evolution

1990 BMW M3 Sport Evolution

1990 BMW M3 Sport Evolution

As the high-profile M3 became the most successful touring car of all time, its civilian version became increasingly exciting. To stay on par with seasonal developments, BMW Motorsports released updated versions each year. These cars mimicked the performance changes required to keep the Group A race car ahead of the competition. The last and most potent evolution of these was the M3 Sport Evolution.

When the Touring rules in Germany and France increased capacity limits to 2.5 liters in 1990, BMW endowed the M3 with its largest engine. In order to make full use of the 2.5 liter limit, they not only increased the stroke of the 2.3 liter unit from 84 to 87 millimeters, but also increased the bores of the four cylinders from 93.4 millimeters each to 95.5 millimeters. This reduced the width between the cylinders to just 4.5 millimeters. But success proved them right. The engines withstood the stresses and strains of touring car racing even at maximum output without any problem.

To meet homologation, BMW released a road-going model that featured this new 238 bhp, 2.5 liter engine which used sodium-cooled exhaust valves, a larger intake tract and a signature red spark plug wires. Aside from the engine, each car had an adjustable front apron and rear wing, as well as a special interior with Sparco seats and suede controls. There was no air-conditioning or electric windows and each of the 600 cars had a numbered plaque on the centre console.

In Detail

type Series Production Car
built at Munich, Germany
production 600
price $ $ 56,000
engine Inline-4
position Front Longituidnal
aspiration Natural
valvetrain DOHC 4 Valves / Cylinder
fuel feed Bosch Electronic Fuel Injection
displacement 2467 cc / 150.5 in³
bore 95.0 mm / 3.74 in
stroke 87.0 mm / 3.43 in
compression 10.2:1
power 177.5 kw / 238 bhp @ 7000 rpm
specific output 96.47 bhp per litre
bhp/weight 198.33 bhp per tonne
torque 240.0 nm / 177.0 ft lbs @ 4750 rpm
redline 7300
body / frame Unit Steel
driven wheels Front Engine / RWD
wheel type Cast Alloy
front tires F 225/45ZR-16
rear tires R 225/45ZR-16
front brakes Vented Discs w/ ABS
rear brakes Vented Discs w/ABS, Power Assist
front wheels F 40.6 x 19.1 cm / 15.9 x 7.5 in
rear wheels R 40.6 x 19.1 cm / 15.9 x 7.5 in
steering Rack & Pinion
f suspension MacPherson Struts w/Coil Springs, Tube Shocks, Anti-Roll Bar
r suspension Semi-Trailing Arms w/Coil Springs, Tube Shocks, Anti-Roll Bar
curb weight 1200 kg / 2646 lbs
wheelbase 2565 mm / 100.9 in
front track 1416 mm / 55.7 in
rear track 1430 mm / 56.3 in
length 4345 mm / 171.1 in
width 1680 mm / 66.1 in
height 1370 mm / 53.9 in
transmission 5-Speed Manual
gear ratios 3.29:1, 2.08:1, 1.45:1, 1.04:1, 0.72:1
final drive 4.23:1
top speed ~248.0 kph / 154.1 mph
0 – 60 mph ~6.3 seconds
0 – 100 mph ~16.0 seconds
0 – 1/4 mile ~14.7 seconds