1978 Mercury Grand Marquis vs. 2011 Infiniti QX56
To start off, 2011 Infiniti QX56 is newer by 33 year(s). Which means there will be less support and parts availability for 1978 Mercury Grand Marquis. In addition, the cost of maintenance, including insurance, on 1978 Mercury Grand Marquis would be higher. At 5,766 cc (8 cylinders), 1978 Mercury Grand Marquis is equipped with a bigger engine. In terms of performance, 2011 Infiniti QX56 (400 HP @ 5800 RPM) has 261 more horse power than 1978 Mercury Grand Marquis. (139 HP @ 3200 RPM) In normal driving conditions, 2011 Infiniti QX56 should accelerate faster than 1978 Mercury Grand Marquis. With that said, vehicle weight also plays an important factor in acceleration. 2011 Infiniti QX56 weights approximately 830 kg more than 1978 Mercury Grand Marquis. 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, 2011 Infiniti QX56 (559 Nm @ 4000 RPM) has 206 more torque (in Nm) than 1978 Mercury Grand Marquis. (353 Nm @ 2200 RPM). This means 2011 Infiniti QX56 will have an easier job in driving up hills or pulling heavy equipment than 1978 Mercury Grand Marquis.
Compare all specifications:
| 1978 Mercury Grand Marquis | 2011 Infiniti QX56 | |
| Make | Mercury | Infiniti |
| Model | Grand Marquis | QX56 |
| Year Released | 1978 | 2011 |
| Body Type | Sedan | SUV |
| Engine Position | Front | Front |
| Engine Size | 5766 cc | 5600 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | V |
| Horse Power | 139 HP | 400 HP |
| Engine RPM | 3200 RPM | 5800 RPM |
| Torque | 353 Nm | 559 Nm |
| Torque RPM | 2200 RPM | 4000 RPM |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | Rear | Rear |
| Number of Seats | 5 seats | 7 seats |
| Number of Doors | 4 doors | 5 doors |
| Vehicle Weight | 1710 kg | 2540 kg |
| Vehicle Length | 5400 mm | 5291 mm |
| Vehicle Width | 1980 mm | 2029 mm |
| Vehicle Height | 1390 mm | 1925 mm |
| Wheelbase Size | 2910 mm | 3076 mm |
