1991 Buick Riviera vs. 2005 Mercedes-Benz ML
To start off, 2005 Mercedes-Benz ML is newer by 14 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 3,994 cc (8 cylinders), 2005 Mercedes-Benz ML is equipped with a bigger engine. In terms of performance, 2005 Mercedes-Benz ML (247 HP @ 4000 RPM) has 77 more horse power than 1991 Buick Riviera. (170 HP @ 4800 RPM) In normal driving conditions, 2005 Mercedes-Benz ML should accelerate faster than 1991 Buick Riviera. With that said, vehicle weight also plays an important factor in acceleration. 2005 Mercedes-Benz ML weights approximately 815 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 2005 Mercedes-Benz ML 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, 2005 Mercedes-Benz ML 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, 2005 Mercedes-Benz ML (560 Nm @ 1700 RPM) has 275 more torque (in Nm) than 1991 Buick Riviera. (285 Nm @ 3200 RPM). This means 2005 Mercedes-Benz ML will have an easier job in driving up hills or pulling heavy equipment than 1991 Buick Riviera.
Compare all specifications:
| 1991 Buick Riviera | 2005 Mercedes-Benz ML | |
| Make | Buick | Mercedes-Benz |
| Model | Riviera | ML |
| Year Released | 1991 | 2005 |
| Body Type | Coupe | SUV |
| Engine Position | Front | Front |
| Engine Size | 3800 cc | 3994 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | V | V |
| Horse Power | 170 HP | 247 HP |
| Engine RPM | 4800 RPM | 4000 RPM |
| Torque | 285 Nm | 560 Nm |
| Torque RPM | 3200 RPM | 1700 RPM |
| Engine Bore Size | 96.5 mm | 86 mm |
| Engine Stroke Size | 86.4 mm | 86 mm |
| Engine Compression Ratio | 8.5:1 | 19.0:1 |
| Fuel Type | Gasoline | Diesel |
| 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 | 2335 kg |
| Vehicle Length | 5040 mm | 4640 mm |
| Vehicle Width | 1830 mm | 1850 mm |
| Vehicle Height | 1350 mm | 1830 mm |
| Wheelbase Size | 2760 mm | 2720 mm |
