1995 Gemballa 911 Le Mans Biturbo In Detail engine Twin Turbo Flat-6 displacement 3746 cc / 228.6 in³ bore 102 mm / 4.02 in stroke 76.4 mm / 3.01 in compression 8.5:1 power 410.1 kw / 549.9 bhp @ 5900 rpm specific output 146.8 bhp per litre bhp/weight 423.0 bhp...