2009 Audi A4 vs. 1991 Audi 100
To start off, 2009 Audi A4 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 2,697 cc (6 cylinders), 2009 Audi A4 is equipped with a bigger engine. In terms of performance, 2009 Audi A4 (187 HP @ 3500 RPM) has 74 more horse power than 1991 Audi 100. (113 HP @ 4000 RPM). In normal driving conditions, 2009 Audi A4 should accelerate faster than 1991 Audi 100. With that said, vehicle weight also plays an important factor in acceleration. 2009 Audi A4 weights approximately 172 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.
Both vehicles are front wheel drive (FWD). Which offers better traction when its slippery than rear wheel drive vehicles. 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 A4 (400 Nm @ 1400 RPM) has 135 more torque (in Nm) than 1991 Audi 100. (265 Nm @ 2250 RPM). This means 2009 Audi A4 will have an easier job in driving up hills or pulling heavy equipment than 1991 Audi 100.
Compare all specifications:
| 2009 Audi A4 | 1991 Audi 100 | |
| Make | Audi | Audi |
| Model | A4 | 100 |
| Year Released | 2009 | 1991 |
| Engine Position | Front | Front |
| Engine Size | 2697 cc | 2461 cc |
| Engine Cylinders | 6 cylinders | 5 cylinders |
| Engine Type | V | in-line |
| Horse Power | 187 HP | 113 HP |
| Engine RPM | 3500 RPM | 4000 RPM |
| Torque | 400 Nm | 265 Nm |
| Torque RPM | 1400 RPM | 2250 RPM |
| Engine Bore Size | 82.6 mm | 81 mm |
| Engine Stroke Size | 84.1 mm | 95.5 mm |
| Fuel Type | Diesel | Diesel |
| Acceleration 0-100mph | 8.3 seconds | 11.6 seconds |
| Drive Type | Front | Front |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 5 doors | 5 doors |
| Vehicle Weight | 1645 kg | 1473 kg |
| Vehicle Length | 4710 mm | 4810 mm |
| Vehicle Width | 1830 mm | 1790 mm |
| Vehicle Height | 1440 mm | 1450 mm |
| Wheelbase Size | 2810 mm | 2700 mm |
| Fuel Tank Capacity | 65 L | 80 L |
