1981 Audi UR vs. 2008 BMW X5
To start off, 2008 BMW X5 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 4,799 cc (8 cylinders), 2008 BMW X5 is equipped with a bigger engine. In terms of performance, 2008 BMW X5 (350 HP @ 6300 RPM) has 153 more horse power than 1981 Audi UR. (197 HP @ 5500 RPM) In normal driving conditions, 2008 BMW X5 should accelerate faster than 1981 Audi UR. With that said, vehicle weight also plays an important factor in acceleration. 2008 BMW X5 weights approximately 304 kg more than 1981 Audi UR. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Both vehicles are four wheel drive (4WD) - it offers better handling, traction, and control in all driving conditions compared with front wheel drive or 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, 2008 BMW X5 (475 Nm @ 3400 RPM) has 190 more torque (in Nm) than 1981 Audi UR. (285 Nm @ 3500 RPM). This means 2008 BMW X5 will have an easier job in driving up hills or pulling heavy equipment than 1981 Audi UR. 2008 BMW X5 has automatic transmission and 1981 Audi UR has manual transmission. 1981 Audi UR will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2008 BMW X5 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 1981 Audi UR | 2008 BMW X5 | |
| Make | Audi | BMW |
| Model | UR | X5 |
| Year Released | 1981 | 2008 |
| Engine Position | Front | Front |
| Engine Size | 2144 cc | 4799 cc |
| Engine Cylinders | 5 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 2 valves | 4 valves |
| Horse Power | 197 HP | 350 HP |
| Engine RPM | 5500 RPM | 6300 RPM |
| Torque | 285 Nm | 475 Nm |
| Torque RPM | 3500 RPM | 3400 RPM |
| Engine Bore Size | 79.5 mm | 93 mm |
| Engine Stroke Size | 86.4 mm | 88.3 mm |
| Engine Compression Ratio | 7.0:1 | 10.5:1 |
| Fuel Type | Gasoline | Gasoline - Premium |
| Drive Type | 4WD | 4WD |
| Transmission Type | Manual | Automatic |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 2 doors | 5 doors |
| Vehicle Weight | 1250 kg | 1554 kg |
| Vehicle Length | 4430 mm | 4860 mm |
| Vehicle Width | 1690 mm | 1940 mm |
| Vehicle Height | 1360 mm | 1740 mm |
| Wheelbase Size | 2530 mm | 2940 mm |
| Fuel Tank Capacity | 70 L | 85 L |
