1991 Audi 100 vs. 2004 Audi A4
To start off, 2004 Audi A4 is newer by 13 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 2,976 cc (6 cylinders), 2004 Audi A4 is equipped with a bigger engine. In terms of performance, 2004 Audi A4 (218 HP @ 6300 RPM) has 46 more horse power than 1991 Audi 100. (172 HP @ 5500 RPM) In normal driving conditions, 2004 Audi A4 should accelerate faster than 1991 Audi 100. With that said, vehicle weight also plays an important factor in acceleration. 2004 Audi A4 weights approximately 214 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.
Let's talk about torque, 2004 Audi A4 (300 Nm @ 3200 RPM) has 50 more torque (in Nm) than 1991 Audi 100. (250 Nm @ 3000 RPM). This means 2004 Audi A4 will have an easier job in driving up hills or pulling heavy equipment than 1991 Audi 100.
Compare all specifications:
| 1991 Audi 100 | 2004 Audi A4 | |
| Make | Audi | Audi |
| Model | 100 | A4 |
| Year Released | 1991 | 2004 |
| Engine Position | Front | Front |
| Engine Size | 2771 cc | 2976 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | V |
| Horse Power | 172 HP | 218 HP |
| Engine RPM | 5500 RPM | 6300 RPM |
| Torque | 250 Nm | 300 Nm |
| Torque RPM | 3000 RPM | 3200 RPM |
| Engine Bore Size | 82.5 mm | 82.5 mm |
| Engine Stroke Size | 86.4 mm | 92.8 mm |
| Fuel Type | Gasoline | Gasoline - Premium |
| Number of Seats | 5 seats | 4 seats |
| Vehicle Weight | 1506 kg | 1720 kg |
| Vehicle Length | 4800 mm | 4580 mm |
| Vehicle Width | 1780 mm | 1780 mm |
| Vehicle Height | 1450 mm | 1400 mm |
