1991 Buick Riviera vs. 1989 Renault 21
To start off, 1991 Buick Riviera is newer by 2 year(s). Which means there will be less support and parts availability for 1989 Renault 21. In addition, the cost of maintenance, including insurance, on 1989 Renault 21 would be higher. At 3,800 cc (6 cylinders), 1991 Buick Riviera is equipped with a bigger engine. In terms of performance, 1991 Buick Riviera (170 HP @ 4800 RPM) has 79 more horse power than 1989 Renault 21. (91 HP @ 5200 RPM). In normal driving conditions, 1991 Buick Riviera should accelerate faster than 1989 Renault 21. With that said, vehicle weight also plays an important factor in acceleration. 1991 Buick Riviera weights approximately 445 kg more than 1989 Renault 21. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Both vehicles are front wheel drive (FWD). Which offers better traction when its slippery than rear wheel drive vehicles. 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, 1991 Buick Riviera (285 Nm @ 3200 RPM) has 147 more torque (in Nm) than 1989 Renault 21. (138 Nm @ 3500 RPM). This means 1991 Buick Riviera will have an easier job in driving up hills or pulling heavy equipment than 1989 Renault 21. 1991 Buick Riviera has automatic transmission and 1989 Renault 21 has manual transmission. 1989 Renault 21 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 1991 Buick Riviera will be easier to drive especially in heavy traffic.
Compare all specifications:
| 1991 Buick Riviera | 1989 Renault 21 | |
| Make | Buick | Renault |
| Model | Riviera | 21 |
| Year Released | 1991 | 1989 |
| Engine Position | Front | Front |
| Engine Size | 3800 cc | 1721 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Horse Power | 170 HP | 91 HP |
| Engine RPM | 4800 RPM | 5200 RPM |
| Torque | 285 Nm | 138 Nm |
| Torque RPM | 3200 RPM | 3500 RPM |
| Engine Compression Ratio | 8.5:1 | 10.0:1 |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | Front | Front |
| Transmission Type | Automatic | Manual |
| Vehicle Weight | 1520 kg | 1075 kg |
| Vehicle Length | 5040 mm | 4650 mm |
| Vehicle Width | 1830 mm | 1720 mm |
| Vehicle Height | 1350 mm | 1430 mm |
| Wheelbase Size | 2760 mm | 2820 mm |
