1994 BMW M5 vs. 2004 BMW 645
To start off, 2004 BMW 645 is newer by 10 year(s). Which means there will be less support and parts availability for 1994 BMW M5. In addition, the cost of maintenance, including insurance, on 1994 BMW M5 would be higher. At 4,392 cc (8 cylinders), 2004 BMW 645 is equipped with a bigger engine. In terms of performance, 1994 BMW M5 (335 HP @ 6900 RPM) has 13 more horse power than 2004 BMW 645. (322 HP @ 7400 RPM). In normal driving conditions, 1994 BMW M5 should accelerate faster than 2004 BMW 645. With that said, vehicle weight also plays an important factor in acceleration. 1994 BMW M5 weights approximately 71 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, 2004 BMW 645 (447 Nm) has 47 more torque (in Nm) than 1994 BMW M5. (400 Nm). This means 2004 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 1994 BMW M5.
Compare all specifications:
| 1994 BMW M5 | 2004 BMW 645 | |
| Make | BMW | BMW |
| Model | M5 | 645 |
| Year Released | 1994 | 2004 |
| Body Type | Station Wagon | Coupe |
| Engine Position | Front | Front |
| Engine Size | 3793 cc | 4392 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Horse Power | 335 HP | 322 HP |
| Engine RPM | 6900 RPM | 7400 RPM |
| Torque | 400 Nm | 447 Nm |
| Engine Bore Size | 94.6 mm | 92 mm |
| Engine Stroke Size | 90 mm | 83 mm |
| Engine Compression Ratio | 10.5:1 | 10.5:1 |
| Drive Type | Rear | Rear |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 5 doors | 2 doors |
| Vehicle Weight | 1786 kg | 1715 kg |
| Vehicle Length | 4730 mm | 4840 mm |
| Vehicle Width | 1760 mm | 1860 mm |
| Vehicle Height | 1400 mm | 1380 mm |
| Wheelbase Size | 2730 mm | 2790 mm |
| Fuel Consumption | 8.4 L/100km | 9.4 L/100km |
| Fuel Consumption City | 18 L/100km | 13.8 L/100km |
| Fuel Consumption Overall | 8.2 L/100km | 11.8 L/100km |
