1999 Audi S8 vs. 2009 Cadillac STS
To start off, 2009 Cadillac STS is newer by 10 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, 2009 Cadillac STS (302 HP @ 6300 RPM) has 55 more horse power than 1999 Audi S8. (247 HP @ 7000 RPM) In normal driving conditions, 2009 Cadillac STS should accelerate faster than 1999 Audi S8. With that said, vehicle weight also plays an important factor in acceleration. 1999 Audi S8 weights approximately 115 kg more than 2009 Cadillac STS.
Because 1999 Audi S8 is all wheel drive (AWD), it will have significant more traction and grip than 2009 Cadillac STS. In wet, icy, snow, or gravel driving conditions, 1999 Audi S8 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, 2009 Cadillac STS (369 Nm @ 5200 RPM) has 39 more torque (in Nm) than 1999 Audi S8. (330 Nm @ 3400 RPM). This means 2009 Cadillac STS will have an easier job in driving up hills or pulling heavy equipment than 1999 Audi S8.
Compare all specifications:
| 1999 Audi S8 | 2009 Cadillac STS | |
| Make | Audi | Cadillac |
| Model | S8 | STS |
| Year Released | 1999 | 2009 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 4170 cc | 3599 cc |
| Engine Cylinders | 8 cylinders | 6 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 247 HP | 302 HP |
| Engine RPM | 7000 RPM | 6300 RPM |
| Torque | 330 Nm | 369 Nm |
| Torque RPM | 3400 RPM | 5200 RPM |
| Engine Compression Ratio | 11.0:1 | 11.3:1 |
| Drive Type | AWD | Rear |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1750 kg | 1635 kg |
| Vehicle Length | 5040 mm | 5000 mm |
| Vehicle Width | 1890 mm | 1850 mm |
| Vehicle Height | 1420 mm | 1470 mm |
| Wheelbase Size | 2890 mm | 2960 mm |
| Fuel Consumption Highway | 9.5 L/100km | 9.1 L/100km |
| Fuel Consumption City | 21.7 L/100km | 13.8 L/100km |
| Fuel Consumption Overall | 13.9 L/100km | 11.8 L/100km |
| Fuel Tank Capacity | 90 L | 64 L |
