2004 BMW 645 vs. 2008 Rolls-Royce Phantom
To start off, 2008 Rolls-Royce Phantom is newer by 4 year(s). Which means there will be less support and parts availability for 2004 BMW 645. In addition, the cost of maintenance, including insurance, on 2004 BMW 645 would be higher. At 6,747 cc (12 cylinders), 2008 Rolls-Royce Phantom is equipped with a bigger engine. In terms of performance, 2008 Rolls-Royce Phantom (454 HP @ 5350 RPM) has 126 more horse power than 2004 BMW 645. (328 HP @ 6100 RPM) In normal driving conditions, 2008 Rolls-Royce Phantom should accelerate faster than 2004 BMW 645. With that said, vehicle weight also plays an important factor in acceleration. 2008 Rolls-Royce Phantom weights approximately 680 kg more than 2004 BMW 645. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Both vehicles are rear wheel drive (RWD) - it offers better handling in dry conditions; in addition, if you are looking to drift, both vehicles do the job better than front wheel drive vehicles. With that said, do keep in mind that many other factors such as speed and the wear on your tires can also have significant impact on traction and control. Let's talk about torque, 2008 Rolls-Royce Phantom (720 Nm @ 3500 RPM) has 269 more torque (in Nm) than 2004 BMW 645. (451 Nm @ 3600 RPM). This means 2008 Rolls-Royce Phantom will have an easier job in driving up hills or pulling heavy equipment than 2004 BMW 645.
Compare all specifications:
| 2004 BMW 645 | 2008 Rolls-Royce Phantom | |
| Make | BMW | Rolls-Royce |
| Model | 645 | Phantom |
| Year Released | 2004 | 2008 |
| Body Type | Convertible | Sedan |
| Engine Position | Front | Front |
| Engine Size | 4398 cc | 6747 cc |
| Engine Cylinders | 8 cylinders | 12 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 328 HP | 454 HP |
| Engine RPM | 6100 RPM | 5350 RPM |
| Torque | 451 Nm | 720 Nm |
| Torque RPM | 3600 RPM | 3500 RPM |
| Engine Bore Size | 92 mm | 92 mm |
| Engine Stroke Size | 82.7 mm | 84.6 mm |
| Fuel Type | Gasoline - Premium | Gasoline |
| Top Speed | 250 km/hour | 240 km/hour |
| Acceleration 0-100mph | 6.1 seconds | 5.9 seconds |
| Drive Type | Rear | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 1815 kg | 2495 kg |
| Vehicle Length | 4830 mm | 5840 mm |
| Vehicle Width | 1860 mm | 2000 mm |
| Vehicle Height | 1380 mm | 1640 mm |
| Wheelbase Size | 2790 mm | 3580 mm |
| Fuel Consumption Overall | 12.8 L/100km | 15.9 L/100km |
| Fuel Tank Capacity | 70 L | 100 L |
