2007 Audi S4 vs. 1991 Ford Mustang
To start off, 2007 Audi S4 is newer by 16 year(s). Which means there will be less support and parts availability for 1991 Ford Mustang. In addition, the cost of maintenance, including insurance, on 1991 Ford Mustang 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 (340 HP @ 7000 RPM) has 234 more horse power than 1991 Ford Mustang. (106 HP @ 4600 RPM). In normal driving conditions, 2007 Audi S4 should accelerate faster than 1991 Ford Mustang. With that said, vehicle weight also plays an important factor in acceleration. 2007 Audi S4 weights approximately 270 kg more than 1991 Ford Mustang. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2007 Audi S4 is four wheel drive (4WD), it will have significant more traction and grip than 1991 Ford Mustang. In wet, icy, snow, or gravel driving conditions, 2007 Audi S4 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, 2007 Audi S4 (410 Nm @ 3500 RPM) has 227 more torque (in Nm) than 1991 Ford Mustang. (183 Nm @ 2600 RPM). This means 2007 Audi S4 will have an easier job in driving up hills or pulling heavy equipment than 1991 Ford Mustang.
Compare all specifications:
| 2007 Audi S4 | 1991 Ford Mustang | |
| Make | Audi | Ford |
| Model | S4 | Mustang |
| Year Released | 2007 | 1991 |
| Body Type | Sedan | Coupe |
| Engine Position | Front | Front |
| Engine Size | 4163 cc | 2301 cc |
| Engine Cylinders | 8 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 5 valves | 2 valves |
| Horse Power | 340 HP | 106 HP |
| Engine RPM | 7000 RPM | 4600 RPM |
| Torque | 410 Nm | 183 Nm |
| Torque RPM | 3500 RPM | 2600 RPM |
| Engine Bore Size | 84.5 mm | 96 mm |
| Engine Stroke Size | 93 mm | 79.5 mm |
| Engine Compression Ratio | 11.0:1 | 9.5:1 |
| Fuel Type | Diesel | Gasoline |
| Drive Type | 4WD | Rear |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1530 kg | 1260 kg |
| Vehicle Length | 4590 mm | 4560 mm |
| Vehicle Width | 1790 mm | 1760 mm |
| Vehicle Height | 1420 mm | 1330 mm |
| Wheelbase Size | 2660 mm | 2560 mm |
| Fuel Tank Capacity | 63 L | 45 L |
