2007 Audi S4 vs. 1991 Audi S2
To start off, 2007 Audi S4 is newer by 16 year(s). Which means there will be less support and parts availability for 1991 Audi S2. In addition, the cost of maintenance, including insurance, on 1991 Audi S2 would be higher. At 4,163 cc (8 cylinders), 2007 Audi S4 is equipped with a bigger engine. In terms of performance, 2007 Audi S4 (339 HP @ 7000 RPM) has 123 more horse power than 1991 Audi S2. (216 HP @ 5900 RPM). In normal driving conditions, 2007 Audi S4 should accelerate faster than 1991 Audi S2. With that said, vehicle weight also plays an important factor in acceleration. 2007 Audi S4 weights approximately 335 kg more than 1991 Audi S2. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Both vehicles are four wheel drive (4WD) - it offers better handling, traction, and control in all driving conditions compared with front wheel drive or 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, 2007 Audi S4 (410 Nm @ 3500 RPM) has 101 more torque (in Nm) than 1991 Audi S2. (309 Nm @ 1950 RPM). This means 2007 Audi S4 will have an easier job in driving up hills or pulling heavy equipment than 1991 Audi S2. 2007 Audi S4 has automatic transmission and 1991 Audi S2 has manual transmission. 1991 Audi S2 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2007 Audi S4 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2007 Audi S4 | 1991 Audi S2 | |
| Make | Audi | Audi |
| Model | S4 | S2 |
| Year Released | 2007 | 1991 |
| Engine Position | Front | Front |
| Engine Size | 4163 cc | 2226 cc |
| Engine Cylinders | 8 cylinders | 5 cylinders |
| Engine Type | V | in-line |
| Horse Power | 339 HP | 216 HP |
| Engine RPM | 7000 RPM | 5900 RPM |
| Torque | 410 Nm | 309 Nm |
| Torque RPM | 3500 RPM | 1950 RPM |
| Engine Bore Size | 84.6 mm | 81.1 mm |
| Engine Stroke Size | 92.8 mm | 86.4 mm |
| Acceleration 0-100mph | 5.9 seconds | 6.1 seconds |
| Drive Type | 4WD | 4WD |
| Transmission Type | Automatic | Manual |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 5 doors | 2 doors |
| Vehicle Weight | 1755 kg | 1420 kg |
| Vehicle Length | 4590 mm | 4410 mm |
| Vehicle Width | 1730 mm | 1720 mm |
| Vehicle Height | 1430 mm | 1380 mm |
| Wheelbase Size | 2650 mm | 2560 mm |
| Fuel Consumption Overall | 12.3 L/100km | 8.3 L/100km |
| Fuel Tank Capacity | 63 L | 70 L |
