2009 Audi S5 vs. 1991 Audi 100
To start off, 2009 Audi S5 is newer by 18 year(s). Which means there will be less support and parts availability for 1991 Audi 100. In addition, the cost of maintenance, including insurance, on 1991 Audi 100 would be higher. At 4,163 cc (8 cylinders), 2009 Audi S5 is equipped with a bigger engine. In terms of performance, 2009 Audi S5 (354 HP @ 6800 RPM) has 223 more horse power than 1991 Audi 100. (131 HP @ 5500 RPM). In normal driving conditions, 2009 Audi S5 should accelerate faster than 1991 Audi 100. With that said, vehicle weight also plays an important factor in acceleration. 2009 Audi S5 weights approximately 360 kg more than 1991 Audi 100. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2009 Audi S5 is four wheel drive (4WD), it will have significant more traction and grip than 1991 Audi 100. In wet, icy, snow, or gravel driving conditions, 2009 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, 2009 Audi S5 (441 Nm @ 3500 RPM) has 255 more torque (in Nm) than 1991 Audi 100. (186 Nm @ 4000 RPM). This means 2009 Audi S5 will have an easier job in driving up hills or pulling heavy equipment than 1991 Audi 100.
Compare all specifications:
| 2009 Audi S5 | 1991 Audi 100 | |
| Make | Audi | Audi |
| Model | S5 | 100 |
| Year Released | 2009 | 1991 |
| Engine Position | Front | Front |
| Engine Size | 4163 cc | 2309 cc |
| Engine Cylinders | 8 cylinders | 5 cylinders |
| Engine Type | V | in-line |
| Horse Power | 354 HP | 131 HP |
| Engine RPM | 6800 RPM | 5500 RPM |
| Torque | 441 Nm | 186 Nm |
| Torque RPM | 3500 RPM | 4000 RPM |
| Engine Bore Size | 84.5 mm | 82.5 mm |
| Engine Stroke Size | 92.8 mm | 86.4 mm |
| Engine Compression Ratio | 12.5:1 | 10.0:1 |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | 4WD | Front |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 5 seats |
| Vehicle Weight | 1770 kg | 1410 kg |
| Vehicle Length | 4640 mm | 4800 mm |
| Vehicle Width | 1990 mm | 1780 mm |
| Vehicle Height | 1380 mm | 1450 mm |
