1981 Audi UR vs. 2008 BMW Z4
To start off, 2008 BMW Z4 is newer by 27 year(s). Which means there will be less support and parts availability for 1981 Audi UR. In addition, the cost of maintenance, including insurance, on 1981 Audi UR would be higher. At 2,497 cc (6 cylinders), 2008 BMW Z4 is equipped with a bigger engine. With that said, vehicle weight also plays an important factor in acceleration. 2008 BMW Z4 weights approximately 110 kg more than 1981 Audi UR.
Because 1981 Audi UR is four wheel drive (4WD), it will have significant more traction and grip than 2008 BMW Z4. In wet, icy, snow, or gravel driving conditions, 1981 Audi UR 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, 1981 Audi UR (285 Nm @ 3500 RPM) has 35 more torque (in Nm) than 2008 BMW Z4. (250 Nm @ 2750 RPM). This means 1981 Audi UR will have an easier job in driving up hills or pulling heavy equipment than 2008 BMW Z4.
Compare all specifications:
| 1981 Audi UR | 2008 BMW Z4 | |
| Make | Audi | BMW |
| Model | UR | Z4 |
| Year Released | 1981 | 2008 |
| Engine Position | Front | Front |
| Engine Size | 2144 cc | 2497 cc |
| Engine Cylinders | 5 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 2 valves | 4 valves |
| Horse Power | 197 HP | 0 HP |
| Torque | 285 Nm | 250 Nm |
| Torque RPM | 3500 RPM | 2750 RPM |
| Engine Bore Size | 79.5 mm | 82 mm |
| Engine Stroke Size | 86.4 mm | 78.8 mm |
| Engine Compression Ratio | 7.0:1 | 11.0:1 |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | 4WD | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 4 seats | 2 seats |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Weight | 1250 kg | 1360 kg |
| Vehicle Length | 4430 mm | 4100 mm |
| Vehicle Width | 1690 mm | 1310 mm |
| Vehicle Height | 1360 mm | 1790 mm |
| Wheelbase Size | 2530 mm | 2500 mm |
| Fuel Tank Capacity | 70 L | 55 L |
