1991 Ford Mustang vs. 2009 Mercury Mountaineer
To start off, 2009 Mercury Mountaineer is newer by 18 year(s). Which means there will be less support and parts availability for 1991 Ford Mustang. In addition, the cost of maintenance, including insurance, on 1991 Ford Mustang would be higher. At 4,009 cc (6 cylinders), 2009 Mercury Mountaineer is equipped with a bigger engine. In terms of performance, 2009 Mercury Mountaineer (210 HP @ 5100 RPM) has 104 more horse power than 1991 Ford Mustang. (106 HP @ 4600 RPM) In normal driving conditions, 2009 Mercury Mountaineer should accelerate faster than 1991 Ford Mustang. With that said, vehicle weight also plays an important factor in acceleration. 2009 Mercury Mountaineer weights approximately 665 kg more than 1991 Ford Mustang. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2009 Mercury Mountaineer is four wheel drive (4WD), it will have significant more traction and grip than 1991 Ford Mustang. In wet, icy, snow, or gravel driving conditions, 2009 Mercury Mountaineer 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 Mercury Mountaineer (344 Nm @ 3700 RPM) has 161 more torque (in Nm) than 1991 Ford Mustang. (183 Nm @ 2600 RPM). This means 2009 Mercury Mountaineer will have an easier job in driving up hills or pulling heavy equipment than 1991 Ford Mustang.
Compare all specifications:
| 1991 Ford Mustang | 2009 Mercury Mountaineer | |
| Make | Ford | Mercury |
| Model | Mustang | Mountaineer |
| Year Released | 1991 | 2009 |
| Body Type | Coupe | SUV |
| Engine Position | Front | Front |
| Engine Size | 2301 cc | 4009 cc |
| Engine Cylinders | 4 cylinders | 6 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 2 valves | 2 valves |
| Horse Power | 106 HP | 210 HP |
| Engine RPM | 4600 RPM | 5100 RPM |
| Torque | 183 Nm | 344 Nm |
| Torque RPM | 2600 RPM | 3700 RPM |
| Engine Compression Ratio | 9.5:1 | 9.7:1 |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | Rear | 4WD |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 2 doors | 5 doors |
| Vehicle Weight | 1260 kg | 1925 kg |
| Vehicle Length | 4560 mm | 4920 mm |
| Vehicle Width | 1760 mm | 1880 mm |
| Vehicle Height | 1330 mm | 1860 mm |
| Wheelbase Size | 2560 mm | 2890 mm |
| Fuel Tank Capacity | 45 L | 85 L |
