1999 Audi S8 vs. 2013 BMW X5
To start off, 2013 BMW X5 is newer by 14 year(s). Which means there will be less support and parts availability for 1999 Audi S8. In addition, the cost of maintenance, including insurance, on 1999 Audi S8 would be higher. At 4,170 cc (8 cylinders), 1999 Audi S8 is equipped with a bigger engine. In terms of performance, 2013 BMW X5 (261 HP @ 4200 RPM) has 14 more horse power than 1999 Audi S8. (247 HP @ 7000 RPM) In normal driving conditions, 2013 BMW X5 should accelerate faster than 1999 Audi S8. With that said, vehicle weight also plays an important factor in acceleration. 2013 BMW X5 weights approximately 605 kg more than 1999 Audi S8. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Both vehicles are all wheel drive (AWD) - 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, 2013 BMW X5 (576 Nm @ 2250 RPM) has 246 more torque (in Nm) than 1999 Audi S8. (330 Nm @ 3400 RPM). This means 2013 BMW X5 will have an easier job in driving up hills or pulling heavy equipment than 1999 Audi S8.
Compare all specifications:
| 1999 Audi S8 | 2013 BMW X5 | |
| Make | Audi | BMW |
| Model | S8 | X5 |
| Year Released | 1999 | 2013 |
| Body Type | Sedan | SUV |
| Engine Position | Front | Front |
| Engine Size | 4170 cc | 2993 cc |
| Engine Cylinders | 8 cylinders | 6 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 247 HP | 261 HP |
| Engine RPM | 7000 RPM | 4200 RPM |
| Torque | 330 Nm | 576 Nm |
| Torque RPM | 3400 RPM | 2250 RPM |
| Engine Bore Size | 84.5 mm | 84 mm |
| Engine Stroke Size | 93 mm | 90 mm |
| Engine Compression Ratio | 11.0:1 | 17 |
| Drive Type | AWD | AWD |
| Transmission Type | Automatic | 6-speed automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 5 doors |
| Vehicle Weight | 1750 kg | 2355 kg |
| Vehicle Length | 5040 mm | 4857 mm |
| Vehicle Width | 1890 mm | 2197 mm |
| Vehicle Height | 1420 mm | 1776 mm |
| Wheelbase Size | 2890 mm | 2933 mm |
| Fuel Consumption Highway | 9.5 L/100km | 7.6 L/100km |
| Fuel Consumption City | 21.7 L/100km | 10.9 L/100km |
| Fuel Tank Capacity | 90 L | 85 L |
