Buick GL8: Which Version Should You Buy?
The Buick GL8 version to choose depends chiefly on whether you value performance, lower kerb weight, fuel flexibility, or a larger fuel tank. Among the specifications provided, the third-generation 2.0 AT is the strongest and fastest option: its Turbo Gasoline engine produces 260 hp and 350 Nm, reaches 100 km/h in 9.3 seconds, and has a top speed of 205 km/h.
The Buick GL8 version to choose depends chiefly on whether you value performance, lower kerb weight, fuel flexibility, or a larger fuel tank. Among the specifications provided, the third-generation 2.0 AT is the strongest and fastest option: its Turbo Gasoline engine produces 260 hp and 350 Nm, reaches 100 km/h in 9.3 seconds, and has a top speed of 205 km/h. The second-generation 2.4 AT is the least powerful at 167 hp but uses 92 fuel, while its 3.0 AT alternative raises output to 258 hp. In the first generation, the 3.4 AT is substantially quicker than the 3.0 AT, despite a power difference of only 8 hp. All five versions are FWD minivans with Automatic transmissions.
Buick GL8 generations: what changed?
The first-generation Buick GL8 ran from 2000 through 2016 as a Minivan with two versions, 3.0 AT and 3.4 AT. Both use naturally aspirated, V-shaped Gasoline engines with 6 cylinders and 2 valves per cylinder. They also share a 4-speed Automatic gearbox, FWD, and a 95-litre fuel tank. The important distinction is performance: the 3.4 AT reaches 100 km/h 5.2 seconds sooner and has a top speed 22 km/h higher than the 3.0 AT.
The second generation ran from 2010 through 2017 and remained a Minivan with two versions. Its 2.4 AT uses an Inline 4-cylinder Gasoline engine with distributed injection (multi-point), while the 3.0 AT uses a V-shaped 6-cylinder Gasoline engine with direct injection (direct). Both have 4 valves per cylinder, no boost, a 6-speed Automatic gearbox, FWD, a 77-litre tank, and a kerb weight of 1,840 kg. Choosing between them is therefore mainly about output and performance rather than vehicle mass.
The third generation began in 2017 and is represented by one Minivan version, the 2.0 AT. Its front, transverse Turbo Gasoline engine has 4 Inline cylinders, 4 valves per cylinder, and distributed injection (multi-point). It pairs 260 hp and 350 Nm with a 6-speed Automatic transmission and FWD. This generation provides the quickest acceleration and highest top speed in the supplied GL8 data, although its 70-litre tank is smaller than those of both earlier generations.
Buick GL8 engine and specs comparison
| Generation and version | Displacement | Power | Torque | Fuel | Cylinders and layout | Boost | Gearbox | Drive |
|---|---|---|---|---|---|---|---|---|
| Third generation 2.0 AT | 1,998 cc | 260 hp (191 kW) at 5,400 rpm | 350 Nm at 2,000–5,000 rpm | Gasoline, 95 | 4, Inline | Turbo | 6-speed Automatic | FWD |
| Second generation 2.4 AT | 2,360 cc | 167 hp (123 kW) at 6,500 rpm | 225 Nm at 4,400 rpm | Gasoline, 92 | 4, Inline | No | 6-speed Automatic | FWD |
| Second generation 3.0 AT | 2,997 cc | 258 hp (190 kW) at 6,800 rpm | 290 Nm at 5,200 rpm | Gasoline, 95 | 6, V-shaped | No | 6-speed Automatic | FWD |
| First generation 3.0 AT | 2,980 cc | 172 hp (127 kW) at 5,200 rpm | 256 Nm at 4,400 rpm | Gasoline, 95 | 6, V-shaped | No | 4-speed Automatic | FWD |
| First generation 3.4 AT | 3,350 cc | 180 hp (132 kW) at 5,200 rpm | 278 Nm at 4,000 rpm | Gasoline, 92 | 6, V-shaped | No | 4-speed Automatic | FWD |
The third-generation 2.0 AT produces approximately 130 hp per litre, the highest specific output here. The second-generation 3.0 AT follows at approximately 86 hp per litre. The first-generation 3.0 AT, first-generation 3.4 AT, and second-generation 2.4 AT deliver approximately 58, 54, and 71 hp per litre, respectively. These calculated figures clarify how the Turbo 2.0 AT achieves the greatest output despite having the smallest displacement.
Torque also separates the choices. The third-generation 2.0 AT develops 350 Nm across 2,000–5,000 rpm, which is 60 Nm more than the second-generation 3.0 AT and 72 Nm more than the first-generation 3.4 AT. Buyers comparing only engine size would miss that advantage.
Performance, acceleration, top speed, and fuel economy
| Generation and version | 0–100 km/h | Top speed | City consumption | Highway consumption | Combined consumption |
|---|---|---|---|---|---|
| Third generation 2.0 AT | 9.3 seconds | 205 km/h | not measured | not measured | not measured |
| Second generation 2.4 AT | 13.3 seconds | 175 km/h | not measured | not measured | not measured |
| Second generation 3.0 AT | 10.9 seconds | 192 km/h | not measured | not measured | not measured |
| First generation 3.0 AT | 16 seconds | 168 km/h | not measured | not measured | not measured |
| First generation 3.4 AT | 10.8 seconds | 190 km/h | not measured | not measured | not measured |
For maximum performance, the third-generation 2.0 AT is the clear choice. It is 1.5 seconds quicker to 100 km/h than the next-quickest version, the first-generation 3.4 AT, and its top speed is 13 km/h above the second-generation 3.0 AT.
Within the second generation, the 3.0 AT has 91 hp and 65 Nm more than the 2.4 AT. It reaches 100 km/h 2.4 seconds sooner and increases top speed by 17 km/h. Because both versions have the same 1,840 kg kerb weight, the power-to-weight contrast is especially direct: the 2.4 AT carries approximately 11.0 kg per hp, whereas the 3.0 AT carries approximately 7.1 kg per hp.
The first-generation choice is less obvious from horsepower alone. The 3.4 AT adds only 8 hp and 22 Nm over the 3.0 AT, but reduces the 0–100 km/h time from 16 seconds to 10.8 seconds. It also raises top speed from 168 to 190 km/h. Fuel-consumption figures were not measured for any listed version, so an mpg or economy ranking cannot be supported by the supplied data.
Buick GL8 weight, ground clearance, tank, and wheel sizes
| Generation and version | Kerb weight | Gross weight | Ground clearance | Fuel tank | Wheel sizes |
|---|---|---|---|---|---|
| Third generation 2.0 AT | 1,980 kg | not measured | not measured | 70 litres | 225/60 R17; 225/55 R18 |
| Second generation 2.4 AT | 1,840 kg | not measured | 144 mm | 77 litres | not measured |
| Second generation 3.0 AT | 1,840 kg | not measured | 143 mm | 77 litres | not measured |
| First generation 3.0 AT | 1,805 kg | not measured | 150 mm | 95 litres | not measured |
| First generation 3.4 AT | 1,845 kg | 2,430 kg | 165 mm | 95 litres | not measured |
Complete exterior dimensions and overall size were not measured in the supplied data. Among the available weight figures, the first-generation 3.0 AT is the lightest at 1,805 kg, while the third-generation 2.0 AT is the heaviest at 1,980 kg. Despite carrying 175 kg more than the first-generation 3.0 AT, the newer 2.0 AT has 88 hp more and needs approximately 7.6 kg per hp instead of approximately 10.5 kg per hp.
The first-generation 3.4 AT has the greatest measured ground clearance at 165 mm, exceeding the first-generation 3.0 AT by 15 mm, the second-generation 2.4 AT by 21 mm, and the second-generation 3.0 AT by 22 mm. Ground clearance for the third-generation 2.0 AT was not measured.
The two first-generation versions have 95-litre tanks. That is 18 litres more than either second-generation version and 25 litres more than the third-generation 2.0 AT. Range cannot be calculated because fuel consumption was not measured.
Brakes, suspension, and emissions specifications
Every listed GL8 has Independent, spring front and rear suspension plus Ventilated disc front brakes. The third-generation 2.0 AT, second-generation 2.4 AT, second-generation 3.0 AT, and first-generation 3.0 AT use Disc rear brakes. The first-generation 3.4 AT instead has Drum rear brakes.
The third-generation 2.0 AT is rated Euro 5. Both second-generation versions are rated Euro 4. The emissions class of both first-generation versions was not measured, and CO₂ output was not measured for any listed GL8.
Which Buick GL8 version should you buy?
Choose the third-generation 2.0 AT if performance is the priority. It combines the highest power, highest torque, quickest 0–100 km/h time, and highest top speed. It also provides the only Turbo engine in the data and the only stated wheel choices, 225/60 R17 and 225/55 R18. Its trade-offs are the highest kerb weight and the smallest tank.
Choose the second-generation 3.0 AT if you want near-maximum power without selecting the third generation. It trails the 2.0 AT by only 2 hp, though it has 60 Nm less torque, takes 1.6 seconds longer to reach 100 km/h, and has a top speed 13 km/h lower. Compared with the second-generation 2.4 AT, its performance advantage is substantial while kerb weight, tank capacity, gearbox, drive, suspension, and brake types remain the same.
Choose the second-generation 2.4 AT if 92 fuel and the 6-speed Automatic gearbox matter more than outright speed. It is the slowest second-generation version, but it avoids the first generation’s 4-speed transmission and retains Disc rear brakes.
Choose the first-generation 3.4 AT over the first-generation 3.0 AT when acceleration, top speed, ground clearance, or 92 fuel is more important. The 3.4 AT is only 40 kg heavier, yet it is 5.2 seconds quicker to 100 km/h. Its specific drawbacks are Drum rear brakes and a lower calculated output per litre.
Choose the first-generation 3.0 AT when the lowest recorded kerb weight is the deciding factor. It weighs 1,805 kg and has the same 95-litre tank as the 3.4 AT, but its 16-second acceleration time and 168 km/h top speed make it the least performance-focused GL8 in this comparison.
No supplied data supports conclusions about Buick GL8 price, availability for sale, interior equipment, problems, reliability, or comparisons with other models. Those considerations should not be inferred from these specifications alone.