1971 Audi 100 vs. 2004 BMW 645
To start off, 2004 BMW 645 is newer by 33 year(s). Which means there will be less support and parts availability for 1971 Audi 100. In addition, the cost of maintenance, including insurance, on 1971 Audi 100 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 213 more horse power than 1971 Audi 100. (109 HP @ 5600 RPM) In normal driving conditions, 2004 BMW 645 should accelerate faster than 1971 Audi 100. With that said, vehicle weight also plays an important factor in acceleration. 2004 BMW 645 weights approximately 665 kg more than 1971 Audi 100. 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, 1971 Audi 100, 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 286 more torque (in Nm) than 1971 Audi 100. (161 Nm). This means 2004 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 1971 Audi 100.
Compare all specifications:
| 1971 Audi 100 | 2004 BMW 645 | |
| Make | Audi | BMW |
| Model | 100 | 645 |
| Year Released | 1971 | 2004 |
| Engine Position | Front | Front |
| Engine Size | 1871 cc | 4392 cc |
| Engine Cylinders | 4 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 2 valves | 4 valves |
| Horse Power | 109 HP | 322 HP |
| Engine RPM | 5600 RPM | 7400 RPM |
| Torque | 161 Nm | 447 Nm |
| Engine Bore Size | 84 mm | 92 mm |
| Engine Stroke Size | 84.4 mm | 83 mm |
| Drive Type | Front | Rear |
| Number of Seats | 5 seats | 4 seats |
| Vehicle Weight | 1050 kg | 1715 kg |
| Vehicle Length | 4590 mm | 4840 mm |
| Vehicle Width | 1730 mm | 1860 mm |
| Vehicle Height | 1430 mm | 1380 mm |
| Wheelbase Size | 2690 mm | 2790 mm |
