1985 Audi 90 vs. 2006 BMW 645
To start off, 2006 BMW 645 is newer by 21 year(s). Which means there will be less support and parts availability for 1985 Audi 90. In addition, the cost of maintenance, including insurance, on 1985 Audi 90 would be higher. At 4,398 cc (8 cylinders), 2006 BMW 645 is equipped with a bigger engine. In terms of performance, 2006 BMW 645 (328 HP @ 6100 RPM) has 214 more horse power than 1985 Audi 90. (114 HP @ 5700 RPM) In normal driving conditions, 2006 BMW 645 should accelerate faster than 1985 Audi 90. With that said, vehicle weight also plays an important factor in acceleration. 2006 BMW 645 weights approximately 760 kg more than 1985 Audi 90. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Let's talk about torque, 2006 BMW 645 (450 Nm @ 3600 RPM) has 282 more torque (in Nm) than 1985 Audi 90. (168 Nm @ 3200 RPM). This means 2006 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 1985 Audi 90.
Compare all specifications:
| 1985 Audi 90 | 2006 BMW 645 | |
| Make | Audi | BMW |
| Model | 90 | 645 |
| Year Released | 1985 | 2006 |
| Engine Position | Front | Front |
| Engine Size | 1992 cc | 4398 cc |
| Engine Cylinders | 5 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Horse Power | 114 HP | 328 HP |
| Engine RPM | 5700 RPM | 6100 RPM |
| Torque | 168 Nm | 450 Nm |
| Torque RPM | 3200 RPM | 3600 RPM |
| Engine Bore Size | 81 mm | 92 mm |
| Engine Stroke Size | 77.4 mm | 83 mm |
| Fuel Type | Gasoline | Gasoline |
| Number of Seats | 4 seats | 4 seats |
| Vehicle Weight | 1050 kg | 1810 kg |
| Vehicle Length | 4470 mm | 4830 mm |
| Vehicle Width | 1690 mm | 1860 mm |
| Vehicle Height | 1370 mm | 1380 mm |
| Wheelbase Size | 2550 mm | 2790 mm |
