2004 BMW 645 vs. 1989 Citroen XM
To start off, 2004 BMW 645 is newer by 15 year(s). Which means there will be less support and parts availability for 1989 Citroen XM. In addition, the cost of maintenance, including insurance, on 1989 Citroen XM would be higher. At 4,392 cc (8 cylinders), 2004 BMW 645 is equipped with a bigger engine. In terms of performance, 2004 BMW 645 (322 HP @ 7400 RPM) has 154 more horse power than 1989 Citroen XM. (168 HP @ 5600 RPM). In normal driving conditions, 2004 BMW 645 should accelerate faster than 1989 Citroen XM. With that said, vehicle weight also plays an important factor in acceleration. 2004 BMW 645 weights approximately 295 kg more than 1989 Citroen XM. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2004 BMW 645 is rear wheel drive (RWD), it offers better handling in dry conditions; in addition, if you are looking to drift, it will be much easier to do with 2004 BMW 645. However, in wet, icy, snow, or gravel driving conditions, 1989 Citroen XM, being front wheel drive (FWD), will offer much better control with better grip. 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, 2004 BMW 645 (447 Nm) has 212 more torque (in Nm) than 1989 Citroen XM. (235 Nm). This means 2004 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 1989 Citroen XM.
Compare all specifications:
| 2004 BMW 645 | 1989 Citroen XM | |
| Make | BMW | Citroen |
| Model | 645 | XM |
| Year Released | 2004 | 1989 |
| Engine Position | Front | Front |
| Engine Size | 4392 cc | 2975 cc |
| Engine Cylinders | 8 cylinders | 6 cylinders |
| Engine Type | V | V |
| Horse Power | 322 HP | 168 HP |
| Engine RPM | 7400 RPM | 5600 RPM |
| Torque | 447 Nm | 235 Nm |
| Engine Bore Size | 92 mm | 93 mm |
| Engine Stroke Size | 83 mm | 73 mm |
| Engine Compression Ratio | 10.5:1 | 9.5:1 |
| Drive Type | Rear | Front |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 2 doors | 5 doors |
| Vehicle Weight | 1715 kg | 1420 kg |
| Vehicle Length | 4840 mm | 4720 mm |
| Vehicle Width | 1860 mm | 1800 mm |
| Vehicle Height | 1380 mm | 1400 mm |
| Wheelbase Size | 2790 mm | 2860 mm |
| Fuel Tank Capacity | 70 L | 80 L |
