BMW hasn’t confirmed any details about the 2008 BMW M3, which may debut as early as the 2006 Mondial de l’Automobile in Paris this September. Rumors are swirling, however, about a 4.0-liter V8 engine based on the V-10 under the hoods of the BMW M5 sedan and M6 coupe. Given BMW’s new penchant for turbocharging (the 2007 BMW 3 Series Coupe will offer a blown six in 335Ci trim, pumping out 300 horsepower), the M3’s motor might be a force fed unit. Whatever it turns out to be, it’s clear that extra clearance is required for the new M3’s powertrain based on the bulging hood attached to this test mule, which replaces the concave contouring of the standard 3 Series Coupe.

Expectations are that the new 2008 BMW M3 will be making 400 horsepower or more, driving power to the rear wheels through a standard seven-speed Sequential Manual Gearbox (SMG) or an available six-speed manual transmission. Industry observers estimate a 0-60 mph acceleration time of about five seconds, with an electronically limited top end of 155 mph.

*Photo copyright Brenda Priddy & Company