2004 BMW 645 vs. 2006 Jaguar XJ
To start off, 2006 Jaguar XJ is newer by 2 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 4,392 cc (8 cylinders), 2004 BMW 645 is equipped with a bigger engine. In terms of performance, 2006 Jaguar XJ (400 HP @ 6100 RPM) has 78 more horse power than 2004 BMW 645. (322 HP @ 7400 RPM) In normal driving conditions, 2006 Jaguar XJ should accelerate faster than 2004 BMW 645. With that said, vehicle weight also plays an important factor in acceleration. 2004 BMW 645 weights approximately 56 kg more than 2006 Jaguar XJ.
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, 2006 Jaguar XJ (560 Nm) has 113 more torque (in Nm) than 2004 BMW 645. (447 Nm). This means 2006 Jaguar XJ will have an easier job in driving up hills or pulling heavy equipment than 2004 BMW 645.
Compare all specifications:
| 2004 BMW 645 | 2006 Jaguar XJ | |
| Make | BMW | Jaguar |
| Model | 645 | XJ |
| Year Released | 2004 | 2006 |
| Body Type | Coupe | Sedan |
| Engine Position | Front | Front |
| Engine Size | 4392 cc | 4195 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 322 HP | 400 HP |
| Engine RPM | 7400 RPM | 6100 RPM |
| Torque | 447 Nm | 560 Nm |
| Engine Bore Size | 92 mm | 86.1 mm |
| Engine Stroke Size | 83 mm | 90 mm |
| Engine Compression Ratio | 10.5:1 | 9.1:1 |
| Drive Type | Rear | Rear |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Weight | 1715 kg | 1659 kg |
| Vehicle Length | 4840 mm | 5220 mm |
| Vehicle Width | 1860 mm | 1950 mm |
| Vehicle Height | 1380 mm | 1460 mm |
| Wheelbase Size | 2790 mm | 3170 mm |
| Fuel Consumption | 9.4 L/100km | 9.8 L/100km |
| Fuel Consumption City | 13.8 L/100km | 13.8 L/100km |
| Fuel Consumption Overall | 11.8 L/100km | 12.4 L/100km |
| Fuel Tank Capacity | 70 L | 84 L |
