Comparison Buick Excelle 1.8i R4 16V (118 Hp) & BMW M8 Gran Coupe (F93) Competition 4.4 V8 (625 Hp) xDrive Steptronic & Buick Regal II Coupe 3.8 V6 (117 Hp)
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| Brand: | Buick | BMW | Buick |
| Model: | Excelle | M8 | Regal |
| Generation: | Excelle | M8 Gran Coupe (F93) | Regal II Coupe |
| Engine / modification: | 1.8i R4 16V (118 Hp) | Competition 4.4 V8 (625 Hp) xDrive Steptronic | 3.8 V6 (117 Hp) |
| Production start: | 2004 year | 2019 year | 1978 year |
| Production end: | 2007 year | 1980 year | |
| Coupe type: | Sedan | Coupe | Coupe |
| Num. of Doors: | 4 | 4 | 2 |
| Num. of seats: | 5 | 5 | 5 |
| Fuel consumption / economy - urban: | 9 l/100 km | 15.2-15.3 l/100 km | 14.7 l/100 km |
| Fuel consumption / economy - extra urban: | 6 l/100 km | 7.8-8.1 l/100 km | 8.7 l/100 km |
| Fuel consumption / economy - combined: | 8.3 l/100 km | 10.5-10.7 l/100 km | 11.8 l/100 km |
| Fuel Type: | Petrol (Gasoline) | Petrol (Gasoline) | Petrol (Gasoline) |
| Drag coefficient: | 0.47 | ||
| Fuel tank volume: | 60 l | 68 l | 68 l |
| Emission standard: | Euro 3 | Euro 6d - TEMP | |
| CO2 emissions: | 240-244 g/km | ||
| Power: | 118 hp | 625 hp | 117 hp |
| Max power in: | 5800 rpm. | 6000 rpm. | 3800 rpm. |
| Maximum speed: | 194 km/h | 250 (305 M Package) km/h | |
| Acceleration from 0 to 100 km/h: | 10.7 sec | 3.2 sec | |
| Acceleration from 0 to 200 km/h: | 11.0 sec | ||
| Torque: | 158 Nm @ 4000 rpm. | 750 Nm @ 1800-5800 rpm. | 258 Nm @ 2000 rpm. |
| Engine position: | Front, transverse | Front, longitudinal | Front, longitudinal |
| Engine displacement: | 1799 cm3 | 4395 cm3 | 3791 cm3 |
| Engine oil capacity: | 10.6 l | ||
| Fuel System: | Multi-point injection | Direct injection | Carburettor |
| Aspiration / Turbine: | Twin-power turbo | ||
| Position of cylinders: | Inline | V engine | V engine |
| Valvetrain: | DOHC | VALVETRONIC | OHV |
| Number of cylinders: | 4 | 8 | 6 |
| Number of valves per cylinder: | 4 | 4 | 2 |
| Compression ratio: | 9.8 | 10 | 8 |
| Piston Stroke: | 86 mm | 88.3 mm | 86.36 mm |
| Cylinder Bore: | 81.6 mm | 89 mm | 96.52 mm |
| Wheel Drive: | Front wheel drive | All wheel drive (4x4) | Rear wheel drive |
| Number of Gears (automatic transmission): | 4 | 8 M Steptronic | |
| Number of Gears (manual transmission): | 5 | 4 | |
| Length: | 4515 mm | 5098 mm | 5080 mm |
| Width: | 1725 mm | 1943 mm | 1781 mm |
| Width including mirrors: | 2137 mm | ||
| Height: | 1445 mm | 1420 mm | 1356 mm |
| Wheelbase: | 2600 mm | 3027 mm | 2746 mm |
| Front track: | 1480 mm | 1626 mm | 1486 mm |
| Rear (Back) track: | 1487 mm | 1660 mm | 1468 mm |
| Ride height(clearance): | 130 mm | ||
| Front overhang: | 950 mm | ||
| Rear overhang: | 1121 mm | ||
| Minimum volume of Luggage (trunk): | 405 l | 440 l | 462 l |
| Maximum amount of Luggage (trunk): | 1225 l | ||
| Front suspension: | The depreciated rack | Double wishbone | Independent, spring |
| Rear suspension: | Double wishbone | Multi-link independent | Suspension De-Dion |
| Max weight: | 1695 kg | 2440 kg | |
| Front brakes: | Disc | Ventilated discs | Disc |
| Rear brakes: | Disc | Ventilated discs | Drum |
| Kerb Weight: | 1210 kg | 1980 kg | 1440 kg |
| ABS: | yes | yes | |
| Steering type: | Steering rack and pinion | Steering rack and pinion | Cone worm with recirculation balls |
| Power steering: | Hydraulic Steering | Electric Steering | |
| Minimum turning circle (turning diameter): | 12.9 m | 12.8 m | |
| Tire size: | 195/55 R15 | Front wheel tires: 275/35 ZR20 102Y XL | 195/75 R14 |
| Wheel rims size: | R15 | Front wheel rims: 9.5J x 20 | R14 |