1999 Audi S8 vs. 2005 Ford Shelby GR-1 Concept
To start off, 2005 Ford Shelby GR-1 Concept is newer by 6 year(s). Which means there will be less support and parts availability for 1999 Audi S8. In addition, the cost of maintenance, including insurance, on 1999 Audi S8 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 270 more horse power than 1999 Audi S8. (335 HP @ 7000 RPM) In normal driving conditions, 2005 Ford Shelby GR-1 Concept should accelerate faster than 1999 Audi S8. With that said, vehicle weight also plays an important factor in acceleration. 2005 Ford Shelby GR-1 Concept weights approximately 39 kg more than 1999 Audi S8. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 1999 Audi S8 is all wheel drive (AWD), it will have significant more traction and grip than 2005 Ford Shelby GR-1 Concept. In wet, icy, snow, or gravel driving conditions, 1999 Audi S8 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 348 more torque (in Nm) than 1999 Audi S8. (331 Nm @ 3400 RPM). This means 2005 Ford Shelby GR-1 Concept will have an easier job in driving up hills or pulling heavy equipment than 1999 Audi S8.
Compare all specifications:
| 1999 Audi S8 | 2005 Ford Shelby GR-1 Concept | |
| Make | Audi | Ford |
| Model | S8 | Shelby GR-1 Concept |
| Year Released | 1999 | 2005 |
| Body Type | Sedan | Coupe |
| Engine Position | Front | Front |
| Engine Size | 4172 cc | 6392 cc |
| Engine Cylinders | 8 cylinders | 10 cylinders |
| Engine Type | V | V |
| Horse Power | 335 HP | 605 HP |
| Engine RPM | 7000 RPM | 6750 RPM |
| Torque | 331 Nm | 679 Nm |
| Torque RPM | 3400 RPM | 5500 RPM |
| Engine Bore Size | 84.5 mm | 93.1 mm |
| Engine Stroke Size | 93 mm | 94 mm |
| Drive Type | AWD | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 2 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1730 kg | 1769 kg |
| Vehicle Length | 5040 mm | 4420 mm |
| Vehicle Width | 1890 mm | 1900 mm |
| Vehicle Height | 1420 mm | 1170 mm |
| Wheelbase Size | 2890 mm | 2550 mm |
| Fuel Tank Capacity | 90 L | 132 L |
