1991 Buick Riviera vs. 2006 Mercury Mountaineer
To start off, 2006 Mercury Mountaineer is newer by 15 year(s). Which means there will be less support and parts availability for 1991 Buick Riviera. In addition, the cost of maintenance, including insurance, on 1991 Buick Riviera would be higher. At 3,996 cc (6 cylinders), 2006 Mercury Mountaineer is equipped with a bigger engine. In terms of performance, 2006 Mercury Mountaineer (210 HP @ 5100 RPM) has 40 more horse power than 1991 Buick Riviera. (170 HP @ 4800 RPM) In normal driving conditions, 2006 Mercury Mountaineer should accelerate faster than 1991 Buick Riviera. With that said, vehicle weight also plays an important factor in acceleration. 2006 Mercury Mountaineer weights approximately 405 kg more than 1991 Buick Riviera. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2006 Mercury Mountaineer is four wheel drive (4WD), it will have significant more traction and grip than 1991 Buick Riviera. In wet, icy, snow, or gravel driving conditions, 2006 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, 2006 Mercury Mountaineer (344 Nm @ 3700 RPM) has 59 more torque (in Nm) than 1991 Buick Riviera. (285 Nm @ 3200 RPM). This means 2006 Mercury Mountaineer will have an easier job in driving up hills or pulling heavy equipment than 1991 Buick Riviera.
Compare all specifications:
| 1991 Buick Riviera | 2006 Mercury Mountaineer | |
| Make | Buick | Mercury |
| Model | Riviera | Mountaineer |
| Year Released | 1991 | 2006 |
| Body Type | Coupe | SUV |
| Engine Position | Front | Front |
| Engine Size | 3800 cc | 3996 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | V | V |
| Horse Power | 170 HP | 210 HP |
| Engine RPM | 4800 RPM | 5100 RPM |
| Torque | 285 Nm | 344 Nm |
| Torque RPM | 3200 RPM | 3700 RPM |
| Engine Bore Size | 96.5 mm | 100.3 mm |
| Engine Stroke Size | 86.4 mm | 84.3 mm |
| Engine Compression Ratio | 8.5:1 | 9.7:1 |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | Front | 4WD |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 2 doors | 5 doors |
| Vehicle Weight | 1520 kg | 1925 kg |
| Vehicle Length | 5040 mm | 4920 mm |
| Vehicle Width | 1830 mm | 1870 mm |
| Vehicle Height | 1350 mm | 1860 mm |
| Wheelbase Size | 2760 mm | 2890 mm |
