2008 Audi S5 vs. 1981 BMW 745
To start off, 2008 Audi S5 is newer by 27 year(s). Which means there will be less support and parts availability for 1981 BMW 745. In addition, the cost of maintenance, including insurance, on 1981 BMW 745 would be higher. At 4,163 cc (8 cylinders), 2008 Audi S5 is equipped with a bigger engine. In terms of performance, 2008 Audi S5 (354 HP @ 6800 RPM) has 102 more horse power than 1981 BMW 745. (252 HP @ 5200 RPM). In normal driving conditions, 2008 Audi S5 should accelerate faster than 1981 BMW 745. With that said, vehicle weight also plays an important factor in acceleration. 2008 Audi S5 weights approximately 175 kg more than 1981 BMW 745. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2008 Audi S5 is four wheel drive (4WD), it will have significant more traction and grip than 1981 BMW 745. In wet, icy, snow, or gravel driving conditions, 2008 Audi S5 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 Audi S5 (441 Nm @ 3500 RPM) has 61 more torque (in Nm) than 1981 BMW 745. (380 Nm @ 2200 RPM). This means 2008 Audi S5 will have an easier job in driving up hills or pulling heavy equipment than 1981 BMW 745.
Compare all specifications:
| 2008 Audi S5 | 1981 BMW 745 | |
| Make | Audi | BMW |
| Model | S5 | 745 |
| Year Released | 2008 | 1981 |
| Body Type | Coupe | Sedan |
| Engine Position | Front | Front |
| Engine Size | 4163 cc | 3430 cc |
| Engine Cylinders | 8 cylinders | 6 cylinders |
| Engine Type | V | in-line |
| Horse Power | 354 HP | 252 HP |
| Engine RPM | 6800 RPM | 5200 RPM |
| Torque | 441 Nm | 380 Nm |
| Torque RPM | 3500 RPM | 2200 RPM |
| Engine Bore Size | 84.5 mm | 92 mm |
| Engine Stroke Size | 92.8 mm | 86 mm |
| Top Speed | 249 km/hour | 220 km/hour |
| Drive Type | 4WD | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 1765 kg | 1590 kg |
| Vehicle Length | 4640 mm | 4870 mm |
| Vehicle Width | 1990 mm | 1810 mm |
| Vehicle Height | 1380 mm | 1440 mm |
| Wheelbase Size | 2760 mm | 2800 mm |
| Fuel Tank Capacity | 63 L | 100 L |
