2005 Audi A8 vs. 1991 Renault 21
To start off, 2005 Audi A8 is newer by 14 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 3,934 cc (8 cylinders), 2005 Audi A8 is equipped with a bigger engine. In terms of performance, 2005 Audi A8 (276 HP @ 3750 RPM) has 201 more horse power than 1991 Renault 21. (75 HP @ 5000 RPM). In normal driving conditions, 2005 Audi A8 should accelerate faster than 1991 Renault 21. With that said, vehicle weight also plays an important factor in acceleration. 2005 Audi A8 weights approximately 920 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 2005 Audi A8 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, 2005 Audi A8 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, 2005 Audi A8 (650 Nm @ 1800 RPM) has 521 more torque (in Nm) than 1991 Renault 21. (129 Nm @ 3250 RPM). This means 2005 Audi A8 will have an easier job in driving up hills or pulling heavy equipment than 1991 Renault 21. 2005 Audi A8 has automatic transmission and 1991 Renault 21 has manual transmission. 1991 Renault 21 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2005 Audi A8 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2005 Audi A8 | 1991 Renault 21 | |
| Make | Audi | Renault |
| Model | A8 | 21 |
| Year Released | 2005 | 1991 |
| Engine Position | Front | Front |
| Engine Size | 3934 cc | 1721 cc |
| Engine Cylinders | 8 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 4 valves | 2 valves |
| Horse Power | 276 HP | 75 HP |
| Engine RPM | 3750 RPM | 5000 RPM |
| Torque | 650 Nm | 129 Nm |
| Torque RPM | 1800 RPM | 3250 RPM |
| Engine Bore Size | 81 mm | 81 mm |
| Engine Stroke Size | 95.5 mm | 83.5 mm |
| Engine Compression Ratio | 18.0:1 | 9.2:1 |
| Fuel Type | Diesel | Gasoline |
| Drive Type | 4WD | Front |
| Transmission Type | Automatic | Manual |
| Vehicle Weight | 1940 kg | 1020 kg |
| Vehicle Length | 5060 mm | 4650 mm |
| Vehicle Width | 1900 mm | 1720 mm |
| Vehicle Height | 1450 mm | 1430 mm |
| Wheelbase Size | 2950 mm | 2820 mm |
