2003 BMW 645 vs. 2005 Jaguar XJ
To start off, 2005 Jaguar XJ is newer by 2 year(s). Which means there will be less support and parts availability for 2003 BMW 645. In addition, the cost of maintenance, including insurance, on 2003 BMW 645 would be higher. At 4,398 cc (8 cylinders), 2003 BMW 645 is equipped with a bigger engine. In terms of performance, 2005 Jaguar XJ (390 HP @ 6150 RPM) has 80 more horse power than 2003 BMW 645. (310 HP @ 6000 RPM) In normal driving conditions, 2005 Jaguar XJ should accelerate faster than 2003 BMW 645. With that said, vehicle weight also plays an important factor in acceleration. 2005 Jaguar XJ weights approximately 36 kg more than 2003 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, 2005 Jaguar XJ (541 Nm @ 3500 RPM) has 91 more torque (in Nm) than 2003 BMW 645. (450 Nm @ 3600 RPM). This means 2005 Jaguar XJ will have an easier job in driving up hills or pulling heavy equipment than 2003 BMW 645.
Compare all specifications:
| 2003 BMW 645 | 2005 Jaguar XJ | |
| Make | BMW | Jaguar |
| Model | 645 | XJ |
| Year Released | 2003 | 2005 |
| Body Type | Coupe | Sedan |
| Engine Position | Front | Front |
| Engine Size | 4398 cc | 4195 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 310 HP | 390 HP |
| Engine RPM | 6000 RPM | 6150 RPM |
| Torque | 450 Nm | 541 Nm |
| Torque RPM | 3600 RPM | 3500 RPM |
| Engine Bore Size | 92 mm | 86 mm |
| Engine Stroke Size | 82.7 mm | 90 mm |
| Engine Compression Ratio | 10.5:1 | 9.1:1 |
| Top Speed | 250 km/hour | 250 km/hour |
| Acceleration 0-100mph | 5.9 seconds | 5.3 seconds |
| Drive Type | Rear | Rear |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 1698 kg | 1734 kg |
| Vehicle Length | 4830 mm | 5100 mm |
| Vehicle Width | 1860 mm | 1870 mm |
| Vehicle Height | 1380 mm | 1450 mm |
| Wheelbase Size | 2790 mm | 3170 mm |
| Fuel Consumption | 8 L/100km | 10 L/100km |
| Fuel Consumption City | 16.1 L/100km | 14 L/100km |
| Fuel Consumption Overall | 10.9 L/100km | 12.7 L/100km |
| Fuel Tank Capacity | 70 L | 84 L |
