2009 Ford Shelby GT 500 vs. 1991 Ford Sierra
To start off, 2009 Ford Shelby GT 500 is newer by 18 year(s). Which means there will be less support and parts availability for 1991 Ford Sierra. In addition, the cost of maintenance, including insurance, on 1991 Ford Sierra would be higher. At 5,408 cc (8 cylinders), 2009 Ford Shelby GT 500 is equipped with a bigger engine. In terms of performance, 2009 Ford Shelby GT 500 (493 HP @ 6000 RPM) has 418 more horse power than 1991 Ford Sierra. (75 HP @ 4500 RPM). In normal driving conditions, 2009 Ford Shelby GT 500 should accelerate faster than 1991 Ford Sierra. With that said, vehicle weight also plays an important factor in acceleration. 1991 Ford Sierra weights approximately 29 kg more than 2009 Ford Shelby GT 500.
Let's talk about torque, 2009 Ford Shelby GT 500 (480 Nm @ 4500 RPM) has 328 more torque (in Nm) than 1991 Ford Sierra. (152 Nm @ 2200 RPM). This means 2009 Ford Shelby GT 500 will have an easier job in driving up hills or pulling heavy equipment than 1991 Ford Sierra.
Compare all specifications:
| 2009 Ford Shelby GT 500 | 1991 Ford Sierra | |
| Make | Ford | Ford |
| Model | Shelby GT 500 | Sierra |
| Year Released | 2009 | 1991 |
| Engine Position | Front | Front |
| Engine Size | 5408 cc | 1751 cc |
| Engine Cylinders | 8 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Horse Power | 493 HP | 75 HP |
| Engine RPM | 6000 RPM | 4500 RPM |
| Torque | 480 Nm | 152 Nm |
| Torque RPM | 4500 RPM | 2200 RPM |
| Engine Compression Ratio | 8.4:1 | 21.5:1 |
| Fuel Type | Gasoline | Diesel |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 1116 kg | 1145 kg |
| Vehicle Length | 4770 mm | 4430 mm |
| Vehicle Width | 1890 mm | 1700 mm |
| Vehicle Height | 1390 mm | 1370 mm |
| Wheelbase Size | 2730 mm | 2620 mm |
| Fuel Tank Capacity | 61 L | 60 L |
