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MODIFICATION

Pontiac Bonneville 3.8 AT Specs — Eighth Generation

The Bonneville's rear window is glazed, so the driver looks straight through the tail of the sedan instead of past the solid pillars framing it.

8 generation · Sedan

1987–1991

3.8 AT

Gasoline · Automatic · FWD

At a glance

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Specifications

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Performance & powertrain

Top speed
?

The highest speed a vehicle can sustain under manufacturer test conditions. Some cars are electronically limited below their mechanical potential. Glossary entry

190 km/h
Engine type
Gasoline
Transmission
Automatic
Type of boost
?

A turbocharger or supercharger compresses the air entering the engine so a smaller engine can produce more power. Naturally aspirated engines draw air without a compressor. Glossary entry

No
Type of drive
?

Which wheels receive power: front-wheel drive, rear-wheel drive or all-wheel drive. All-wheel drive can send power to every wheel for extra traction. Glossary entry

FWD
Bore and stroke
?

The diameter of a cylinder (bore) and the distance the piston travels inside it (stroke). Together they determine the displacement of the engine. Glossary entry

96.52 × 86.36 mm
Engine capacity
?

The total volume swept by all pistons inside the cylinders, usually stated in cubic centimetres or litres. Larger displacement often means more power but higher consumption. Glossary entry

3791 cm³
Engine location
Front, longitudinal
Number of gears
?

How many fixed forward ratios a gearbox offers. More gears can improve economy and refinement; continuously variable transmissions have no fixed steps. Glossary entry

4
Maximum power
?

A unit of engine or motor output. One metric horsepower is about 0.735 kilowatts. Peak power is normally reached at high engine speed. Glossary entry

165 hp
Maximum power, kw
?

A unit of engine or motor output. One metric horsepower is about 0.735 kilowatts. Peak power is normally reached at high engine speed. Glossary entry

121 kW
Compression ratio
?

The ratio between the largest and smallest volume of a cylinder as the piston moves. Higher ratios improve efficiency but may require higher-octane fuel. Glossary entry

8.5
Maximum power rpm
4400 rpm
Maximum torque N⋅m
298 N⋅m
Maximum torque rpm
2800 rpm
Acceleration to 100
?

The time a vehicle needs to reach 100 km/h from a standstill, a common shorthand for overall performance. Glossary entry

Not provided
Engine power system
Distributed injection (multi-point)
Number of cylinders
6
Valves per cylinder
?

The number of intake and exhaust valves in each cylinder. Four valves per cylinder is common and helps the engine breathe at higher speeds. Glossary entry

2
Cylinder arrangement
V-shaped
Maximum power ICE
Not provided
Maximum power ICE
Not provided

Energy & emissions

ECO class
Not provided
Battery power
Not provided
Fuel grade
80
Mild Hybrid
?

A car with a small electric motor and battery that assist the combustion engine and recover braking energy but cannot drive on electricity alone. Glossary entry

Not provided
Battery type
Not provided
CO2 emissions
?

The amount of carbon dioxide released per kilometre under a standardised test. Lower figures usually go hand in hand with lower fuel consumption. Glossary entry

Not provided
Full charge home
Not provided
Power consumption
Not provided
Fuel tank capacity
68 l
Full public charging time
Not provided
Driving range, maximum
?

The distance an electric or plug-in vehicle can travel on a full charge under a stated test cycle. Temperature, speed and load change the real result. Glossary entry

Not provided
Driving range, minimum
?

The distance an electric or plug-in vehicle can travel on a full charge under a stated test cycle. Temperature, speed and load change the real result. Glossary entry

Not provided
Fuel consumption city
Not provided
Average consumption
Not provided
Fuel consumption highway
Not provided

Dimensions & body

Doors number
4
Number of seats
5
Width
1839 mm
Height
1410 mm
Length
5040 mm
Body type
Sedan
Wheelbase
?

The distance between the centres of the front and rear wheels. A longer wheelbase usually gives more cabin space and a calmer ride; a shorter one helps agility and parking. Glossary entry

2815 mm
U-turn diameter
Not provided
Depth of the ford to be crossed
Not provided
Body style
Sedan
Rear track width
?

The distance between the centres of the two wheels on the same axle. A wider track generally improves stability in corners. Glossary entry

1520 mm
Trunk volume max
Not provided
Trunk volume min
Not provided
Front track width
?

The distance between the centres of the two wheels on the same axle. A wider track generally improves stability in corners. Glossary entry

1530 mm
Max weight
Not provided
Curb weight
?

The weight of the vehicle with all standard equipment and fluids but without passengers or cargo. Glossary entry

1500 kg
Ground clearance, maximum
?

The gap between the lowest point of the underbody and the road. More clearance helps on rough roads and steep driveway ramps. Glossary entry

Not provided
Ground clearance, minimum
?

The gap between the lowest point of the underbody and the road. More clearance helps on rough roads and steep driveway ramps. Glossary entry

150 mm

Identity & configuration

Vehicle class
E
Right-hand drive
No

Additional specifications

Stop
1991-01-31
Start
1987-01-01
Wheel size
Not provided
Rear brakes
Disc
Front brakes
Ventilated disc
Rear suspension
Independent, spring
Front suspension
Independent, spring

Not provided means the source has no value. Zero remains zero. Units are shown as supplied; range test cycles are only stated when known.

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Units

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Engine and Transmission

In this sedan the selector first commits the gearbox to a forward or reverse output path; only after that does the automatic pick among ratios, which all send torque the same way and differ purely in multiplication.

Drivetrain and Everyday Driving

A wheel spins endlessly about its hub, while suspension movement is the hub itself swinging on links through a limited travel. The automatic feels only the spinning, so shifts stay unaffected by that vertical motion.

Body and Practicality

The boot boundary of this sedan is the welded shell, floor and lid aperture, all fixed in place. Bags inside are separate objects, lifted in and out through that unchanging opening.