2009 Audi Q7 vs. 1991 Mercedes-Benz 400
To start off, 2009 Audi Q7 is newer by 18 year(s). Which means there will be less support and parts availability for 1991 Mercedes-Benz 400. In addition, the cost of maintenance, including insurance, on 1991 Mercedes-Benz 400 would be higher. At 4,196 cc (8 cylinders), 1991 Mercedes-Benz 400 is equipped with a bigger engine. In terms of performance, 2009 Audi Q7 (322 HP @ 3750 RPM) has 36 more horse power than 1991 Mercedes-Benz 400. (286 HP @ 5700 RPM). In normal driving conditions, 2009 Audi Q7 should accelerate faster than 1991 Mercedes-Benz 400. With that said, vehicle weight also plays an important factor in acceleration. 2009 Audi Q7 weights approximately 416 kg more than 1991 Mercedes-Benz 400. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2009 Audi Q7 is four wheel drive (4WD), it will have significant more traction and grip than 1991 Mercedes-Benz 400. In wet, icy, snow, or gravel driving conditions, 2009 Audi Q7 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 Q7 (760 Nm @ 1800 RPM) has 350 more torque (in Nm) than 1991 Mercedes-Benz 400. (410 Nm @ 3900 RPM). This means 2009 Audi Q7 will have an easier job in driving up hills or pulling heavy equipment than 1991 Mercedes-Benz 400.
Compare all specifications:
| 2009 Audi Q7 | 1991 Mercedes-Benz 400 | |
| Make | Audi | Mercedes-Benz |
| Model | Q7 | 400 |
| Year Released | 2009 | 1991 |
| Engine Position | Front | Front |
| Engine Size | 4132 cc | 4196 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | V |
| Horse Power | 322 HP | 286 HP |
| Engine RPM | 3750 RPM | 5700 RPM |
| Torque | 760 Nm | 410 Nm |
| Torque RPM | 1800 RPM | 3900 RPM |
| Engine Bore Size | 83 mm | 92 mm |
| Engine Stroke Size | 95.5 mm | 78.9 mm |
| Engine Compression Ratio | 16.5:1 | 10.0:1 |
| Top Speed | 236 km/hour | 245 km/hour |
| Acceleration 0-100mph | 6.4 seconds | 7.7 seconds |
| Drive Type | 4WD | Rear |
| Number of Doors | 5 doors | 4 doors |
| Vehicle Weight | 2420 kg | 2004 kg |
| Vehicle Length | 5090 mm | 5220 mm |
| Vehicle Width | 1990 mm | 1890 mm |
| Vehicle Height | 1780 mm | 1500 mm |
| Wheelbase Size | 3010 mm | 3150 mm |
