1991 Audi S2 vs. 2005 Ford Shelby GR-1 Concept
To start off, 2005 Ford Shelby GR-1 Concept is newer by 14 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 6,392 cc (10 cylinders), 2005 Ford Shelby GR-1 Concept is equipped with a bigger engine. In terms of performance, 2005 Ford Shelby GR-1 Concept (605 HP @ 6750 RPM) has 389 more horse power than 1991 Audi S2. (216 HP @ 5900 RPM) In normal driving conditions, 2005 Ford Shelby GR-1 Concept should accelerate faster than 1991 Audi S2. With that said, vehicle weight also plays an important factor in acceleration. 2005 Ford Shelby GR-1 Concept weights approximately 349 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.
Because 1991 Audi S2 is four wheel drive (4WD), it will have significant more traction and grip than 2005 Ford Shelby GR-1 Concept. In wet, icy, snow, or gravel driving conditions, 1991 Audi S2 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, 2005 Ford Shelby GR-1 Concept (679 Nm @ 5500 RPM) has 370 more torque (in Nm) than 1991 Audi S2. (309 Nm @ 1950 RPM). This means 2005 Ford Shelby GR-1 Concept will have an easier job in driving up hills or pulling heavy equipment than 1991 Audi S2.
Compare all specifications:
| 1991 Audi S2 | 2005 Ford Shelby GR-1 Concept | |
| Make | Audi | Ford |
| Model | S2 | Shelby GR-1 Concept |
| Year Released | 1991 | 2005 |
| Engine Position | Front | Front |
| Engine Size | 2226 cc | 6392 cc |
| Engine Cylinders | 5 cylinders | 10 cylinders |
| Engine Type | in-line | V |
| Horse Power | 216 HP | 605 HP |
| Engine RPM | 5900 RPM | 6750 RPM |
| Torque | 309 Nm | 679 Nm |
| Torque RPM | 1950 RPM | 5500 RPM |
| Engine Bore Size | 81.1 mm | 93.1 mm |
| Engine Stroke Size | 86.4 mm | 94 mm |
| Engine Compression Ratio | 9.3:1 | 10.8:1 |
| Drive Type | 4WD | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 4 seats | 2 seats |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Weight | 1420 kg | 1769 kg |
| Vehicle Length | 4410 mm | 4420 mm |
| Vehicle Width | 1720 mm | 1900 mm |
| Vehicle Height | 1380 mm | 1170 mm |
| Wheelbase Size | 2560 mm | 2550 mm |
| Fuel Tank Capacity | 70 L | 132 L |
