Comparison Rolls-Royce Phantom Coupe (facelift 2012) 6.7 V12 (460 Hp) Automatic & Buick Regal II Coupe 4.9 V8 (142 Hp) Automatic
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| Brand: | Rolls-Royce | Buick |
| Model: | Phantom | Regal |
| Generation: | Phantom Coupe (facelift 2012) | Regal II Coupe |
| Engine / modification: | 6.7 V12 (460 Hp) Automatic | 4.9 V8 (142 Hp) Automatic |
| Production start: | 2012 year | 1978 year |
| Production end: | 2016 year | 1987 year |
| Coupe type: | Coupe | Coupe |
| Num. of Doors: | 2 | 2 |
| Num. of seats: | 4 | 5 |
| Fuel consumption / economy - urban: | 22.8 l/100 km | 13.8 l/100 km |
| Fuel consumption / economy - extra urban: | 10.2 l/100 km | 9.4 l/100 km |
| Fuel consumption / economy - combined: | 14.8 l/100 km | 11.8 l/100 km |
| Fuel Type: | Petrol (Gasoline) | Petrol (Gasoline) |
| Drag coefficient: | 0.47 | |
| Fuel tank volume: | 100 l | 68 l |
| Emission standard: | EURO VI | |
| CO2 emissions: | 347 g/km | 107 g/km |
| Power: | 460 hp | 142 hp |
| Max power in: | 5350 rpm. | 4000 rpm. |
| Maximum speed: | 250 km/h | 160 km/h |
| Acceleration from 0 to 100 km/h: | 5.8 sec | 14.9 sec |
| Torque: | 720 Nm/3500 rpm. | 325 Nm @ 1800 rpm. |
| Engine position: | Front, longitudinal | Front, longitudinal |
| Engine displacement: | 6749 cm3 | 4942 cm3 |
| Engine oil capacity: | 8.5 l | |
| Coolant: | 14 l | |
| Fuel System: | Direct injection | Carburettor |
| Position of cylinders: | V engine | V engine |
| Valvetrain: | DOHC, Ti-VCT | |
| Number of cylinders: | 12 | 8 |
| Number of valves per cylinder: | 4 | 2 |
| Compression ratio: | 8.2 | |
| Piston Stroke: | 84.6 mm | 76.2 mm |
| Cylinder Bore: | 92 mm | 101.6 mm |
| Wheel Drive: | Rear wheel drive | Front wheel drive |
| Number of Gears (automatic transmission): | 8 | 3 Hydramatic |
| Number of Gears (manual transmission): | 5 | |
| Length: | 5612 mm | 5080 mm |
| Width: | 1987 mm | 1781 mm |
| Width with mirrors folded: | 1783 mm | |
| Width including mirrors: | 1941 mm | |
| Height: | 1598 mm | 1356 mm |
| Wheelbase: | 3320 mm | 2746 mm |
| Front track: | 1686 mm | 1486 mm |
| Rear (Back) track: | 1676 mm | 1468 mm |
| Minimum volume of Luggage (trunk): | 395 l | 462 l |
| Maximum amount of Luggage (trunk): | 1093 l | |
| Front suspension: | Independent, spring | |
| Rear suspension: | Suspension De-Dion | |
| Max weight: | 3050 kg | 1600 kg |
| Front brakes: | Ventilated discs | Disc |
| Rear brakes: | Ventilated discs | Drum |
| Kerb Weight: | 2580 kg | 1543 kg |
| ABS: | yes | yes |
| Steering type: | Steering rack and pinion | Cone worm with recirculation balls |
| Power steering: | Electric Steering | Electric Steering |
| Max. roof load: | 50 kg | |
| Minimum turning circle (turning diameter): | 13.1 m | 12.8 m |
| Tire size: | 255/50 R21; 285/45 R21 | 195/75 R14 |
| Wheel rims size: | 8J x 21; 9.5J x 21 | R14 |