1981 BMW 725 vs. 2006 GMC Sierra
To start off, 2006 GMC Sierra is newer by 25 year(s). Which means there will be less support and parts availability for 1981 BMW 725. In addition, the cost of maintenance, including insurance, on 1981 BMW 725 would be higher. At 5,358 cc (8 cylinders), 2006 GMC Sierra is equipped with a bigger engine. In terms of performance, 2006 GMC Sierra (295 HP @ 5200 RPM) has 147 more horse power than 1981 BMW 725. (148 HP @ 5500 RPM) In normal driving conditions, 2006 GMC Sierra should accelerate faster than 1981 BMW 725.
Let's talk about torque, 2006 GMC Sierra (454 Nm @ 4000 RPM) has 239 more torque (in Nm) than 1981 BMW 725. (215 Nm @ 4000 RPM). This means 2006 GMC Sierra will have an easier job in driving up hills or pulling heavy equipment than 1981 BMW 725.
Compare all specifications:
| 1981 BMW 725 | 2006 GMC Sierra | |
| Make | BMW | GMC |
| Model | 725 | Sierra |
| Year Released | 1981 | 2006 |
| Body Type | Sedan | Pickup |
| Engine Position | Front | Front |
| Engine Size | 2493 cc | 5358 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 2 valves | 2 valves |
| Horse Power | 148 HP | 295 HP |
| Engine RPM | 5500 RPM | 5200 RPM |
| Torque | 215 Nm | 454 Nm |
| Torque RPM | 4000 RPM | 4000 RPM |
| Engine Bore Size | 86 mm | 96 mm |
| Engine Stroke Size | 71.6 mm | 92 mm |
| Engine Compression Ratio | 9.6:1 | 9.5:1 |
| Fuel Type | Gasoline | Gasoline / Electric Hybrid |
| Number of Seats | 5 seats | 6 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Length | 4870 mm | 5850 mm |
| Vehicle Width | 1810 mm | 2000 mm |
| Vehicle Height | 1440 mm | 1810 mm |
| Wheelbase Size | 2810 mm | 3650 mm |
