The answer is simple: The one that claimed victories at the 24 Hours Nürburgring, Spa 24 Hours, Guia Race, European Touring Car Championship, Manx Rally, Deutsche Tourenwagen Meisterschaft—and of course, won World Touring Car Championship titles.
1988 BMW M3 Japan Evolution
Layout
Longitudinal front engine, rear-wheel drive
Engine
2.3-liter I4, dohc, 16-valve
Transmission
Five-speed manual
Wheels and Tires
BMW factory alloys, 7.5x16
Michelin Pilot Sport, 225/45
Interior
Recaro driver seat, M Technic II steering wheel, custom McIntosh audio system
Performance
Peak Power: 220 hp @ 6750 rpm
Peak Torque: 181 lb-ft @ 4750 rpm
0-62 mph: 6.2 sec.
Top Speed: 152 mph