1975 Audi 100 vs. 2007 BMW 645
To start off, 2007 BMW 645 is newer by 32 year(s). Which means there will be less support and parts availability for 1975 Audi 100. In addition, the cost of maintenance, including insurance, on 1975 Audi 100 would be higher. At 4,398 cc (8 cylinders), 2007 BMW 645 is equipped with a bigger engine. In terms of performance, 2007 BMW 645 (328 HP @ 6100 RPM) has 243 more horse power than 1975 Audi 100. (85 HP @ 5800 RPM) In normal driving conditions, 2007 BMW 645 should accelerate faster than 1975 Audi 100. With that said, vehicle weight also plays an important factor in acceleration. 2007 BMW 645 weights approximately 640 kg more than 1975 Audi 100. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2007 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 2007 BMW 645. However, in wet, icy, snow, or gravel driving conditions, 1975 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, 2007 BMW 645 (450 Nm @ 3600 RPM) has 326 more torque (in Nm) than 1975 Audi 100. (124 Nm @ 3500 RPM). This means 2007 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 1975 Audi 100.
Compare all specifications:
| 1975 Audi 100 | 2007 BMW 645 | |
| Make | Audi | BMW |
| Model | 100 | 645 |
| Year Released | 1975 | 2007 |
| Engine Position | Front | Front |
| Engine Size | 1588 cc | 4398 cc |
| Engine Cylinders | 4 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 2 valves | 4 valves |
| Horse Power | 85 HP | 328 HP |
| Engine RPM | 5800 RPM | 6100 RPM |
| Torque | 124 Nm | 450 Nm |
| Torque RPM | 3500 RPM | 3600 RPM |
| Fuel Type | Gasoline | Gasoline - Premium |
| Drive Type | Front | Rear |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1050 kg | 1690 kg |
| Vehicle Length | 4590 mm | 4830 mm |
| Vehicle Width | 1730 mm | 1860 mm |
| Vehicle Height | 1400 mm | 1380 mm |
| Wheelbase Size | 2690 mm | 2790 mm |
| Fuel Tank Capacity | 58 L | 70 L |
