1998 Buick Signia vs. 1991 Ford Sierra
To start off, 1998 Buick Signia is newer by 7 year(s). Which means there will be less support and parts availability for 1991 Ford Sierra. In addition, the cost of maintenance, including insurance, on 1991 Ford Sierra would be higher. At 3,800 cc (6 cylinders), 1998 Buick Signia is equipped with a bigger engine. In terms of performance, 1998 Buick Signia (238 HP @ 5200 RPM) has 163 more horse power than 1991 Ford Sierra. (75 HP @ 4500 RPM). In normal driving conditions, 1998 Buick Signia should accelerate faster than 1991 Ford Sierra. With that said, vehicle weight also plays an important factor in acceleration. 1998 Buick Signia weights approximately 595 kg more than 1991 Ford Sierra. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Let's talk about torque, 1998 Buick Signia (387 Nm @ 3600 RPM) has 235 more torque (in Nm) than 1991 Ford Sierra. (152 Nm @ 2200 RPM). This means 1998 Buick Signia will have an easier job in driving up hills or pulling heavy equipment than 1991 Ford Sierra.
Compare all specifications:
| 1998 Buick Signia | 1991 Ford Sierra | |
| Make | Buick | Ford |
| Model | Signia | Sierra |
| Year Released | 1998 | 1991 |
| Engine Position | Front | Front |
| Engine Size | 3800 cc | 1751 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Horse Power | 238 HP | 75 HP |
| Engine RPM | 5200 RPM | 4500 RPM |
| Torque | 387 Nm | 152 Nm |
| Torque RPM | 3600 RPM | 2200 RPM |
| Fuel Type | Gasoline | Diesel |
| Vehicle Weight | 1740 kg | 1145 kg |
| Vehicle Length | 4710 mm | 4430 mm |
| Vehicle Width | 1890 mm | 1700 mm |
| Vehicle Height | 1550 mm | 1370 mm |
| Wheelbase Size | 2860 mm | 2620 mm |
