2006 Chevrolet Impala vs. 2008 GMC Sierra
To start off, 2008 GMC Sierra is newer by 2 year(s). Which means there will be less support and parts availability for 2006 Chevrolet Impala. In addition, the cost of maintenance, including insurance, on 2006 Chevrolet Impala would be higher. At 6,000 cc (8 cylinders), 2008 GMC Sierra is equipped with a bigger engine. In terms of performance, 2008 GMC Sierra (353 HP @ 5400 RPM) has 153 more horse power than 2006 Chevrolet Impala. (200 HP @ 5900 RPM) In normal driving conditions, 2008 GMC Sierra should accelerate faster than 2006 Chevrolet Impala.
Because 2008 GMC Sierra is four wheel drive (4WD), it will have significant more traction and grip than 2006 Chevrolet Impala. In wet, icy, snow, or gravel driving conditions, 2008 GMC Sierra 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, 2008 GMC Sierra (506 Nm @ 4400 RPM) has 208 more torque (in Nm) than 2006 Chevrolet Impala. (298 Nm @ 4000 RPM). This means 2008 GMC Sierra will have an easier job in driving up hills or pulling heavy equipment than 2006 Chevrolet Impala.
Compare all specifications:
| 2006 Chevrolet Impala | 2008 GMC Sierra | |
| Make | Chevrolet | GMC |
| Model | Impala | Sierra |
| Year Released | 2006 | 2008 |
| Body Type | Sedan | Pickup |
| Engine Position | Front | Front |
| Engine Size | 3491 cc | 6000 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 2 valves | 2 valves |
| Horse Power | 200 HP | 353 HP |
| Engine RPM | 5900 RPM | 5400 RPM |
| Torque | 298 Nm | 506 Nm |
| Torque RPM | 4000 RPM | 4400 RPM |
| Engine Compression Ratio | 9.8:1 | 9.6:1 |
| Drive Type | Front | 4WD |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 3 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Length | 5100 mm | 5720 mm |
| Vehicle Width | 1860 mm | 2440 mm |
| Vehicle Height | 1500 mm | 1960 mm |
| Wheelbase Size | 2810 mm | 3380 mm |
| Fuel Tank Capacity | 64 L | 129 L |
