2009 Audi A8 vs. 1991 Mercedes-Benz S
To start off, 2009 Audi A8 is newer by 18 year(s). Which means there will be less support and parts availability for 1991 Mercedes-Benz S. In addition, the cost of maintenance, including insurance, on 1991 Mercedes-Benz S would be higher. At 3,936 cc (8 cylinders), 2009 Audi A8 is equipped with a bigger engine. In terms of performance, 2009 Audi A8 (271 HP @ 3750 RPM) has 107 more horse power than 1991 Mercedes-Benz S. (164 HP @ 4600 RPM). In normal driving conditions, 2009 Audi A8 should accelerate faster than 1991 Mercedes-Benz S. With that said, vehicle weight also plays an important factor in acceleration. 2009 Audi A8 weights approximately 420 kg more than 1991 Mercedes-Benz S. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2009 Audi A8 is four wheel drive (4WD), it will have significant more traction and grip than 1991 Mercedes-Benz S. In wet, icy, snow, or gravel driving conditions, 2009 Audi A8 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 Audi A8 (650 Nm @ 1800 RPM) has 422 more torque (in Nm) than 1991 Mercedes-Benz S. (228 Nm @ 4600 RPM). This means 2009 Audi A8 will have an easier job in driving up hills or pulling heavy equipment than 1991 Mercedes-Benz S. 2009 Audi A8 has automatic transmission and 1991 Mercedes-Benz S has manual transmission. 1991 Mercedes-Benz S will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2009 Audi A8 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2009 Audi A8 | 1991 Mercedes-Benz S | |
| Make | Audi | Mercedes-Benz |
| Model | A8 | S |
| Year Released | 2009 | 1991 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 3936 cc | 2598 cc |
| Engine Cylinders | 8 cylinders | 6 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 4 valves | 2 valves |
| Horse Power | 271 HP | 164 HP |
| Engine RPM | 3750 RPM | 4600 RPM |
| Torque | 650 Nm | 228 Nm |
| Torque RPM | 1800 RPM | 4600 RPM |
| Fuel Type | Diesel | Gasoline |
| Drive Type | 4WD | Rear |
| Transmission Type | Automatic | Manual |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1940 kg | 1520 kg |
| Vehicle Length | 5060 mm | 5030 mm |
| Vehicle Width | 1900 mm | 1830 mm |
| Vehicle Height | 1450 mm | 1440 mm |
| Wheelbase Size | 2950 mm | 2950 mm |
