2009 Audi A4 vs. 2005 Ford Shelby GR-1 Concept
To start off, 2009 Audi A4 is newer by 4 year(s). Which means there will be less support and parts availability for 2005 Ford Shelby GR-1 Concept. In addition, the cost of maintenance, including insurance, on 2005 Ford Shelby GR-1 Concept 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 444 more horse power than 2009 Audi A4. (161 HP @ 4000 RPM) In normal driving conditions, 2005 Ford Shelby GR-1 Concept should accelerate faster than 2009 Audi A4. With that said, vehicle weight also plays an important factor in acceleration. 2005 Ford Shelby GR-1 Concept weights approximately 49 kg more than 2009 Audi A4. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2005 Ford Shelby GR-1 Concept is rear wheel drive (RWD), it offers better handling in dry conditions; in addition, if you are looking to drift, it will be much easier to do with 2005 Ford Shelby GR-1 Concept. However, in wet, icy, snow, or gravel driving conditions, 2009 Audi A4, being front wheel drive (FWD), will offer much better control with better grip. 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 329 more torque (in Nm) than 2009 Audi A4. (350 Nm @ 1500 RPM). This means 2005 Ford Shelby GR-1 Concept will have an easier job in driving up hills or pulling heavy equipment than 2009 Audi A4.
Compare all specifications:
| 2009 Audi A4 | 2005 Ford Shelby GR-1 Concept | |
| Make | Audi | Ford |
| Model | A4 | Shelby GR-1 Concept |
| Year Released | 2009 | 2005 |
| Body Type | Convertible | Coupe |
| Engine Position | Front | Front |
| Engine Size | 2495 cc | 6392 cc |
| Engine Cylinders | 6 cylinders | 10 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 161 HP | 605 HP |
| Engine RPM | 4000 RPM | 6750 RPM |
| Torque | 350 Nm | 679 Nm |
| Torque RPM | 1500 RPM | 5500 RPM |
| Engine Bore Size | 78.3 mm | 93.1 mm |
| Engine Stroke Size | 86.4 mm | 94 mm |
| Engine Compression Ratio | 18.0:1 | 10.8:1 |
| Fuel Type | Diesel | Gasoline |
| Drive Type | Front | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 4 seats | 2 seats |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Weight | 1720 kg | 1769 kg |
| Vehicle Length | 4580 mm | 4420 mm |
| Vehicle Width | 1780 mm | 1900 mm |
| Vehicle Height | 1400 mm | 1170 mm |
| Wheelbase Size | 2660 mm | 2550 mm |
| Fuel Tank Capacity | 70 L | 132 L |
