1993 Audi S4 vs. 2008 BMW 645
To start off, 2008 BMW 645 is newer by 15 year(s). Which means there will be less support and parts availability for 1993 Audi S4. In addition, the cost of maintenance, including insurance, on 1993 Audi S4 would be higher. At 4,398 cc (8 cylinders), 2008 BMW 645 is equipped with a bigger engine. In terms of performance, 2008 BMW 645 (328 HP) has 102 more horse power than 1993 Audi S4. (226 HP) In normal driving conditions, 2008 BMW 645 should accelerate faster than 1993 Audi S4.
Because 1993 Audi S4 is four wheel drive (4WD), it will have significant more traction and grip than 2008 BMW 645. In wet, icy, snow, or gravel driving conditions, 1993 Audi S4 will offer significantly more control. 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, 2008 BMW 645 (450 Nm) has 97 more torque (in Nm) than 1993 Audi S4. (353 Nm). This means 2008 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 1993 Audi S4.
Compare all specifications:
| 1993 Audi S4 | 2008 BMW 645 | |
| Make | Audi | BMW |
| Model | S4 | 645 |
| Year Released | 1993 | 2008 |
| Body Type | Sedan | Convertible |
| Engine Position | Front | Front |
| Engine Size | 2199 cc | 4398 cc |
| Engine Cylinders | 5 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 226 HP | 328 HP |
| Torque | 353 Nm | 450 Nm |
| Engine Bore Size | 81 mm | 92 mm |
| Engine Stroke Size | 86.4 mm | 82.7 mm |
| Engine Compression Ratio | 9.3:1 | 10.0:1 |
| Top Speed | 245 km/hour | 250 km/hour |
| Drive Type | 4WD | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Length | 4800 mm | 4830 mm |
| Vehicle Width | 1810 mm | 1860 mm |
| Vehicle Height | 1450 mm | 1380 mm |
| Wheelbase Size | 2700 mm | 2790 mm |
