2009 Audi S4 vs. 1991 Audi 100
To start off, 2009 Audi S4 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 4,161 cc (8 cylinders), 2009 Audi S4 is equipped with a bigger engine. In terms of performance, 2009 Audi S4 (340 HP @ 6800 RPM) has 168 more horse power than 1991 Audi 100. (172 HP @ 5500 RPM). In normal driving conditions, 2009 Audi S4 should accelerate faster than 1991 Audi 100. With that said, vehicle weight also plays an important factor in acceleration. 1991 Audi 100 weights approximately 620 kg more than 2009 Audi S4.
Compare all specifications:
| 2009 Audi S4 | 1991 Audi 100 | |
| Make | Audi | Audi |
| Model | S4 | 100 |
| Year Released | 2009 | 1991 |
| Engine Position | Front | Front |
| Engine Size | 4161 cc | 2771 cc |
| Engine Cylinders | 8 cylinders | 6 cylinders |
| Engine Type | V | in-line |
| Horse Power | 340 HP | 172 HP |
| Engine RPM | 6800 RPM | 5500 RPM |
| Fuel Type | Gasoline | Gasoline |
| Number of Seats | 4 seats | 5 seats |
| Vehicle Weight | 930 kg | 1550 kg |
| Vehicle Length | 4580 mm | 4800 mm |
| Vehicle Width | 1780 mm | 1780 mm |
| Vehicle Height | 1400 mm | 1450 mm |
| Wheelbase Size | 2660 mm | 2690 mm |
