Comparison Rolls-Royce Dawn 6.6 V12 (601 Hp) Automatic Black Badge & Buick Regal I Coupe 5.7 V8 (167 Hp) Automatic
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| Brand: | Rolls-Royce | Buick |
| Model: | Dawn | Regal |
| Generation: | Dawn | Regal I Coupe |
| Engine / modification: | 6.6 V12 (601 Hp) Automatic Black Badge | 5.7 V8 (167 Hp) Automatic |
| Production start: | 2017 year | 1973 year |
| Production end: | 1977 year | |
| Coupe type: | Cabriolet | Coupe |
| Num. of Doors: | 2 | 2 |
| Num. of seats: | 4 | 5 |
| Fuel consumption / economy - urban: | 22.9 l/100 km | |
| Fuel consumption / economy - extra urban: | 10.1 l/100 km | |
| Fuel consumption / economy - combined: | 14.7 l/100 km | |
| Fuel Type: | Petrol (Gasoline) | Petrol (Gasoline) |
| Drag coefficient: | 0.48 | |
| Fuel tank volume: | 83 l | |
| CO2 emissions: | 337 g/km | |
| Power: | 601 hp | 167 hp |
| Max power in: | 5250-6000 rpm. | 3800 rpm. |
| Maximum speed: | 250 km/h | |
| Acceleration from 0 to 100 km/h: | 4.9 sec | |
| Torque: | 840 Nm @ 1650-4750 rpm. | 353 Nm @ 2200 rpm. |
| Engine position: | Front, longitudinal | Front, longitudinal |
| Engine displacement: | 6592 cm3 | 5724 cm3 |
| Engine oil capacity: | 4.7 l | |
| Coolant: | 16 l | |
| Fuel System: | Direct injection | Carburettor |
| Position of cylinders: | V engine | V engine |
| Number of cylinders: | 12 | 8 |
| Number of valves per cylinder: | 4 | 2 |
| Compression ratio: | 10 | 8 |
| Piston Stroke: | 97.79 mm | |
| Cylinder Bore: | 96.52 mm | |
| Wheel Drive: | Rear wheel drive | Rear wheel drive |
| Number of Gears (automatic transmission): | 8 | 3 Hydramatic |
| Length: | 5285 mm | 5352 mm |
| Width: | 1947 mm | 2007 mm |
| Height: | 1502 mm | 1359 mm |
| Wheelbase: | 3112 mm | 2845 mm |
| Front track: | 1562 mm | |
| Rear (Back) track: | 1542 mm | |
| Ride height(clearance): | 145 mm | |
| Minimum volume of Luggage (trunk): | 321 l | 416 l |
| Front brakes: | Ventilated discs | Disc |
| Rear brakes: | Ventilated discs | Drum |
| Kerb Weight: | 2560 kg | 1836 kg |
| ABS: | yes | |
| Steering type: | Steering rack and pinion | |
| Power steering: | Electric Steering | |
| Minimum turning circle (turning diameter): | 12.7 m | 13.6 m |
| Tire size: | 185/75 R14; 195/70 R14; 205/65 R14; 215/60 R14; 195/70 R14 | |
| Wheel rims size: | R14 |