2005 Ford Shelby GR-1 Concept vs. 1973 Porsche 911
To start off, 2005 Ford Shelby GR-1 Concept is newer by 32 year(s). Which means there will be less support and parts availability for 1973 Porsche 911. In addition, the cost of maintenance, including insurance, on 1973 Porsche 911 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 397 more horse power than 1973 Porsche 911. (208 HP @ 6300 RPM). In normal driving conditions, 2005 Ford Shelby GR-1 Concept should accelerate faster than 1973 Porsche 911. With that said, vehicle weight also plays an important factor in acceleration. 2005 Ford Shelby GR-1 Concept weights approximately 819 kg more than 1973 Porsche 911. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Let's talk about torque, 2005 Ford Shelby GR-1 Concept (679 Nm @ 5500 RPM) has 419 more torque (in Nm) than 1973 Porsche 911. (260 Nm @ 5100 RPM). This means 2005 Ford Shelby GR-1 Concept will have an easier job in driving up hills or pulling heavy equipment than 1973 Porsche 911.
Compare all specifications:
| 2005 Ford Shelby GR-1 Concept | 1973 Porsche 911 | |
| Make | Ford | Porsche |
| Model | Shelby GR-1 Concept | 911 |
| Year Released | 2005 | 1973 |
| Body Type | Coupe | Coupe |
| Engine Position | Front | Rear |
| Engine Size | 6392 cc | 2687 cc |
| Engine Cylinders | 10 cylinders | 6 cylinders |
| Engine Type | V | boxer |
| Horse Power | 605 HP | 208 HP |
| Engine RPM | 6750 RPM | 6300 RPM |
| Torque | 679 Nm | 260 Nm |
| Torque RPM | 5500 RPM | 5100 RPM |
| Fuel Type | Gasoline | Gasoline |
| Number of Seats | 2 seats | 4 seats |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Weight | 1769 kg | 950 kg |
| Vehicle Length | 4420 mm | 4110 mm |
| Vehicle Width | 1900 mm | 1660 mm |
| Vehicle Height | 1170 mm | 1330 mm |
| Wheelbase Size | 2550 mm | 2280 mm |
