2005 Ford Shelby GR-1 Concept vs. 2007 Opel Astra
To start off, 2007 Opel Astra is newer by 2 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 482 more horse power than 2007 Opel Astra. (123 HP @ 5600 RPM). In normal driving conditions, 2005 Ford Shelby GR-1 Concept should accelerate faster than 2007 Opel Astra. With that said, vehicle weight also plays an important factor in acceleration. 2005 Ford Shelby GR-1 Concept weights approximately 491 kg more than 2007 Opel Astra. 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, 2007 Opel Astra, 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 509 more torque (in Nm) than 2007 Opel Astra. (170 Nm @ 3800 RPM). This means 2005 Ford Shelby GR-1 Concept will have an easier job in driving up hills or pulling heavy equipment than 2007 Opel Astra.
Compare all specifications:
| 2005 Ford Shelby GR-1 Concept | 2007 Opel Astra | |
| Make | Ford | Opel |
| Model | Shelby GR-1 Concept | Astra |
| Year Released | 2005 | 2007 |
| Body Type | Coupe | Hatchback |
| Engine Position | Front | Front |
| Engine Size | 6392 cc | 1796 cc |
| Engine Cylinders | 10 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 605 HP | 123 HP |
| Engine RPM | 6750 RPM | 5600 RPM |
| Torque | 679 Nm | 170 Nm |
| Torque RPM | 5500 RPM | 3800 RPM |
| Engine Bore Size | 93.1 mm | 80.5 mm |
| Engine Stroke Size | 94 mm | 88.2 mm |
| Engine Compression Ratio | 10.8:1 | 10.5:1 |
| Fuel Type | Gasoline | Gasoline - Premium |
| Drive Type | Rear | Front |
| Number of Seats | 2 seats | 5 seats |
| Number of Doors | 2 doors | 3 doors |
| Vehicle Weight | 1769 kg | 1278 kg |
| Vehicle Length | 4420 mm | 4300 mm |
| Vehicle Width | 1900 mm | 1760 mm |
| Vehicle Height | 1170 mm | 1440 mm |
| Wheelbase Size | 2550 mm | 2620 mm |
| Fuel Tank Capacity | 132 L | 52 L |
