2007 Porsche 911 vs. 1991 Renault 21
To start off, 2007 Porsche 911 is newer by 16 year(s). Which means there will be less support and parts availability for 1991 Renault 21. In addition, the cost of maintenance, including insurance, on 1991 Renault 21 would be higher. At 3,824 cc (6 cylinders), 2007 Porsche 911 is equipped with a bigger engine. In terms of performance, 2007 Porsche 911 (351 HP @ 6600 RPM) has 276 more horse power than 1991 Renault 21. (75 HP @ 5000 RPM). In normal driving conditions, 2007 Porsche 911 should accelerate faster than 1991 Renault 21. With that said, vehicle weight also plays an important factor in acceleration. 2007 Porsche 911 weights approximately 455 kg more than 1991 Renault 21. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2007 Porsche 911 is four wheel drive (4WD), it will have significant more traction and grip than 1991 Renault 21. In wet, icy, snow, or gravel driving conditions, 2007 Porsche 911 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, 2007 Porsche 911 (400 Nm @ 4600 RPM) has 271 more torque (in Nm) than 1991 Renault 21. (129 Nm @ 3250 RPM). This means 2007 Porsche 911 will have an easier job in driving up hills or pulling heavy equipment than 1991 Renault 21.
Compare all specifications:
| 2007 Porsche 911 | 1991 Renault 21 | |
| Make | Porsche | Renault |
| Model | 911 | 21 |
| Year Released | 2007 | 1991 |
| Engine Position | Rear | Front |
| Engine Size | 3824 cc | 1721 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | boxer | in-line |
| Valves per Cylinder | 4 valves | 2 valves |
| Horse Power | 351 HP | 75 HP |
| Engine RPM | 6600 RPM | 5000 RPM |
| Torque | 400 Nm | 129 Nm |
| Torque RPM | 4600 RPM | 3250 RPM |
| Engine Bore Size | 99 mm | 81 mm |
| Engine Stroke Size | 82.8 mm | 83.5 mm |
| Engine Compression Ratio | 11.8:1 | 9.2:1 |
| Fuel Type | Gasoline - Premium | Gasoline |
| Drive Type | 4WD | Front |
| Transmission Type | Manual | Manual |
| Vehicle Weight | 1475 kg | 1020 kg |
| Vehicle Length | 4430 mm | 4650 mm |
| Vehicle Width | 1860 mm | 1720 mm |
| Vehicle Height | 1310 mm | 1430 mm |
| Wheelbase Size | 2360 mm | 2820 mm |
