1990 Renault 21 vs. 2007 BMW Z4
To start off, 2007 BMW Z4 is newer by 17 year(s). Which means there will be less support and parts availability for 1990 Renault 21. In addition, the cost of maintenance, including insurance, on 1990 Renault 21 would be higher. At 2,492 cc (6 cylinders), 2007 BMW Z4 is equipped with a bigger engine. In terms of performance, 2007 BMW Z4 (189 HP @ 6000 RPM) has 14 more horse power than 1990 Renault 21. (175 HP @ 5200 RPM) In normal driving conditions, 2007 BMW Z4 should accelerate faster than 1990 Renault 21. With that said, vehicle weight also plays an important factor in acceleration. 1990 Renault 21 weights approximately 10 kg more than 2007 BMW Z4.
Because 1990 Renault 21 is four wheel drive (4WD), it will have significant more traction and grip than 2007 BMW Z4. In wet, icy, snow, or gravel driving conditions, 1990 Renault 21 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, 1990 Renault 21 (271 Nm @ 3000 RPM) has 26 more torque (in Nm) than 2007 BMW Z4. (245 Nm @ 3500 RPM). This means 1990 Renault 21 will have an easier job in driving up hills or pulling heavy equipment than 2007 BMW Z4. 2007 BMW Z4 has automatic transmission and 1990 Renault 21 has manual transmission. 1990 Renault 21 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2007 BMW Z4 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 1990 Renault 21 | 2007 BMW Z4 | |
| Make | Renault | BMW |
| Model | 21 | Z4 |
| Year Released | 1990 | 2007 |
| Engine Position | Front | Front |
| Engine Size | 2068 cc | 2492 cc |
| Engine Cylinders | 4 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 175 HP | 189 HP |
| Engine RPM | 5200 RPM | 6000 RPM |
| Torque | 271 Nm | 245 Nm |
| Torque RPM | 3000 RPM | 3500 RPM |
| Engine Bore Size | 88 mm | 84 mm |
| Engine Stroke Size | 82 mm | 75 mm |
| Top Speed | 222 km/hour | 235 km/hour |
| Drive Type | 4WD | Rear |
| Transmission Type | Manual | Automatic |
| Number of Seats | 5 seats | 2 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1345 kg | 1335 kg |
| Vehicle Length | 4650 mm | 4100 mm |
| Vehicle Width | 1720 mm | 1790 mm |
| Vehicle Height | 1450 mm | 1310 mm |
| Wheelbase Size | 2610 mm | 2500 mm |
| Fuel Tank Capacity | 62 L | 55 L |
