Comparison Alpina B12 Coupe (E31) 5.0 i V12 (350 Hp) & Pontiac Grand AM (H) 2.5 (98 Hp)
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| Brand: | Alpina | Pontiac |
| Model: | B12 | Grand AM |
| Generation: | B12 Coupe (E31) | Grand AM (H) |
| Engine / modification: | 5.0 i V12 (350 Hp) | 2.5 (98 Hp) |
| Production start: | 1990 year | 1987 year |
| Production end: | 1994 year | 1988 year |
| Coupe type: | Coupe | Sedan |
| Num. of Doors: | 2 | 4 |
| Num. of seats: | 4 | 5 |
| Fuel consumption / economy - urban: | 19.4 l/100 km | |
| Fuel consumption / economy - extra urban: | 8.8 l/100 km | |
| Fuel consumption / economy - combined: | 10.5 l/100 km | |
| Fuel Type: | Petrol (Gasoline) | Petrol (Gasoline) |
| Fuel tank volume: | 90 l | |
| Power: | 350 hp | 98 hp |
| Max power in: | 5300 rpm. | 4800 rpm. |
| Maximum speed: | 280 km/h | |
| Acceleration from 0 to 100 km/h: | 6.8 sec | |
| Torque: | 470 Nm @ 4000 rpm. | 183 Nm/3200 rpm. |
| Engine position: | Front, longitudinal | |
| Engine displacement: | 4988 cm3 | 2471 cm3 |
| Fuel System: | Multi-point injection | Multi-point injection |
| Position of cylinders: | V engine | Inline |
| Valvetrain: | OHC | |
| Number of cylinders: | 12 | 4 |
| Number of valves per cylinder: | 2 | 2 |
| Compression ratio: | 9.5 | 8.3 |
| Piston Stroke: | 75 mm | 76.2 mm |
| Cylinder Bore: | 84 mm | 101.6 mm |
| Wheel Drive: | Rear wheel drive | Front wheel drive |
| Number of Gears (automatic transmission): | 4 | 3 |
| Number of Gears (manual transmission): | 5 | |
| Length: | 4780 mm | 4510 mm |
| Width: | 1855 mm | 1690 mm |
| Height: | 1330 mm | 1340 mm |
| Wheelbase: | 2684 mm | 2630 mm |
| Front track: | 1560 mm | |
| Rear (Back) track: | 1552 mm | |
| Minimum volume of Luggage (trunk): | 320 l | |
| Front suspension: | Coil spring | |
| Rear suspension: | Helical spring | |
| Max weight: | 2260 kg | |
| Front brakes: | Ventilated discs | Disc |
| Rear brakes: | Disc | Drum |
| Kerb Weight: | 1790 kg | |
| ABS: | yes | |
| Power steering: | Hydraulic Steering | |
| Tire size: | 245/40 R18 |