1978 Audi 100 vs. 2005 BMW 645
To start off, 2005 BMW 645 is newer by 27 year(s). Which means there will be less support and parts availability for 1978 Audi 100. In addition, the cost of maintenance, including insurance, on 1978 Audi 100 would be higher. At 4,392 cc (8 cylinders), 2005 BMW 645 is equipped with a bigger engine. In terms of performance, 2005 BMW 645 (326 HP @ 6100 RPM) has 241 more horse power than 1978 Audi 100. (85 HP @ 5600 RPM) In normal driving conditions, 2005 BMW 645 should accelerate faster than 1978 Audi 100. With that said, vehicle weight also plays an important factor in acceleration. 2005 BMW 645 weights approximately 785 kg more than 1978 Audi 100. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2005 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 2005 BMW 645. However, in wet, icy, snow, or gravel driving conditions, 1978 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, 2005 BMW 645 (447 Nm @ 3600 RPM) has 323 more torque (in Nm) than 1978 Audi 100. (124 Nm @ 3200 RPM). This means 2005 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 1978 Audi 100.
Compare all specifications:
| 1978 Audi 100 | 2005 BMW 645 | |
| Make | Audi | BMW |
| Model | 100 | 645 |
| Year Released | 1978 | 2005 |
| Engine Position | Front | Front |
| Engine Size | 1588 cc | 4392 cc |
| Engine Cylinders | 4 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Horse Power | 85 HP | 326 HP |
| Engine RPM | 5600 RPM | 6100 RPM |
| Torque | 124 Nm | 447 Nm |
| Torque RPM | 3200 RPM | 3600 RPM |
| Fuel Type | Gasoline | Gasoline - Premium |
| Drive Type | Front | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 4 seats |
| Vehicle Weight | 1110 kg | 1895 kg |
| Vehicle Length | 4600 mm | 4830 mm |
| Vehicle Width | 1770 mm | 1860 mm |
| Vehicle Height | 1400 mm | 1380 mm |
| Wheelbase Size | 2680 mm | 2890 mm |
