2005 Infiniti QX56 vs. 1991 Mercedes-Benz S
To start off, 2005 Infiniti QX56 is newer by 14 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 5,555 cc (8 cylinders), 2005 Infiniti QX56 is equipped with a bigger engine. In terms of performance, 2005 Infiniti QX56 (315 HP @ 6400 RPM) has 151 more horse power than 1991 Mercedes-Benz S. (164 HP @ 4600 RPM). In normal driving conditions, 2005 Infiniti QX56 should accelerate faster than 1991 Mercedes-Benz S. With that said, vehicle weight also plays an important factor in acceleration. 2005 Infiniti QX56 weights approximately 911 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.
Both vehicles are rear wheel drive (RWD) - it offers better handling in dry conditions; in addition, if you are looking to drift, both vehicles do the job better than front 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, 2005 Infiniti QX56 (529 Nm) has 301 more torque (in Nm) than 1991 Mercedes-Benz S. (228 Nm). This means 2005 Infiniti QX56 will have an easier job in driving up hills or pulling heavy equipment than 1991 Mercedes-Benz S. 2005 Infiniti QX56 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. 2005 Infiniti QX56 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2005 Infiniti QX56 | 1991 Mercedes-Benz S | |
| Make | Infiniti | Mercedes-Benz |
| Model | QX56 | S |
| Year Released | 2005 | 1991 |
| Body Type | SUV | Sedan |
| Engine Position | Front | Front |
| Engine Size | 5555 cc | 2598 cc |
| Engine Cylinders | 8 cylinders | 6 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 4 valves | 2 valves |
| Horse Power | 315 HP | 164 HP |
| Engine RPM | 6400 RPM | 4600 RPM |
| Torque | 529 Nm | 228 Nm |
| Engine Bore Size | 98 mm | 82.9 mm |
| Engine Stroke Size | 92 mm | 80.3 mm |
| Drive Type | Rear | Rear |
| Transmission Type | Automatic | Manual |
| Number of Seats | 7 seats | 5 seats |
| Number of Doors | 5 doors | 4 doors |
| Vehicle Weight | 2431 kg | 1520 kg |
| Vehicle Length | 5260 mm | 5030 mm |
| Vehicle Width | 2010 mm | 1830 mm |
| Vehicle Height | 1960 mm | 1440 mm |
| Wheelbase Size | 3140 mm | 2950 mm |
