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Pontiac Bonneville Hardtop Coupé

(1977 model)

Brief specs of 1977 Pontiac Bonneville Hardtop Coupé

2-door 5-seater fixed-head coupé, petrol (gasoline) 8-cylinder 16-valve V engine, OHV (overhead valve, I-head), 6586 cm3 / 401.9 cu in / 401.9 cu in, 138.0 kW / 185.1 hp / 185.1 hp @ 3600 rpm / 3600 rpm / 3600 rpm, 434.0 N·m / 320.1 lb·ft / 320.1 lb·ft @ 1600 rpm / 1600 rpm / 1600 rpm, automatic 3-speed transmission, rear wheel drive

units: metric UK US

Basic (general) data

Marque (make)PontiacIssued from1977
ModelBonneville Hardtop CoupéIssued until
SerieBonnevilleNumber made
Model familyBody construction
Model codeBody designation
ManufacturerPontiacCountryUS

Bodywork

Base platformNumber of doors2
Bodywork typefixed-head coupéNumber of seats5
Bodywork designerCargo capacity (volume)
Passenger space (volume)Max. cargo capacity (volume)

Dimensions & Weight

Length5443 mm / 214.3 in / 214.3 inTotal (curb) weight1642 kg / 3620 lb / 3620 lb
Width1923 mm / 75.7 in / 75.7 inDry weight
Height1369 mm / 53.9 in / 53.9 inLoad capacity
Wheelbase2944 mm / 115.9 in / 115.9 inGross (max.) weight
Track front1567 mm / 61.7 in / 61.7 inTowing weight
Track rear1542 mm / 60.7 in / 60.7 inWeight distribution (front)
Ground clearance142 mm / 5.6 in / 5.6 inFuel capacity80 l / 17.6 UK gal / 21.1 US gal
Length/wheelbase ratio1.85  

Aerodynamics

Drag coefficient (Cd, Cx, Cw)Frontal area (A)2.24 m2 / 24.1 sq ft / 24.1 sq ft (est.)
Aerodynamic coefficient (Cd×A)Aerodynamic resistance (Aero horse power) at 100 km/h (62 mph)

Engine

Engine CodeTotal number of cylinders8
Engine TypeV engine Total number of valves16
Engine ManufacturerPontiacValves per cylinder2
Engine constructioncast iron block & headBore110.5 mm / 4.35 in / 4.35 in
Fuelpetrol (gasoline)Stroke85.8 mm / 3.38 in / 3.38 in
Fuel detailsBore/Stroke ratio1.29
Fuel supply1 Rochester M4MC carburettorEngine displacement6586 cm3 / 401.9 cu in / 401.9 cu in
Engine Main bearings5Unitary capacity823.25 cm3/cylinder / 50.238 cu in/cylinder / 50.238 cu in/cylinder
Cam DesignOHV (overhead valve, I-head)Compression ratio8.0 : 1
SumpMax. output power138.0 kW / 185.1 hp / 185.1 hp at 3600 rpm / 3600 rpm / 3600 rpm
AspirationnaturalMax. torque434.0 N·m / 320.1 lb·ft / 320.1 lb·ft at 1600 rpm / 1600 rpm / 1600 rpm
Compressor typeN/AMaximum rpm4400 rpm / 4400 rpm / 4400 rpm
IntercoolernoMax. net output (power at the wheels)55.2 kW / 74.0 hp / 74.0 hp (est.)
CoolantwaterSpecific output20.9 kW/l / 0.460 bhp/cu in / 0.460 bhp/cu in
Catalytic converteryesSpecific torque65.9 N·m/l / 0.58 lb·ft/cu in / 0.58 lb·ft/cu in

Transmission

Transmission typeautomaticNumber of gears3
Wheel driverear wheel driveTop gear (drive) ratio1
  Final gear (drive) ratio

Performance

Acceleration 0-50 mph (80 km/h)Top (maximal) speed
Acceleration 0-60 mph (97 km/h)Power-to-weight ratio112.7 kW/ton / 85.4 bhp/ton / 85.4 bhp/ton
Acceleration 0-100 km/hFuel consumption, City (urban)
Acceleration 0-100 mph (160 km/h)Fuel consumption, Road (extra-urban)
Acceleration 80-120 km/h (50-70 mph) in topFuel consumption, Mixed (combined)
Standing ¼mile time Fuel consumption, Euro
Standing kilometer time CO2 emissions
  Range

Chassis

Engine locationfrontEngine alignmentlongitudinal
Steeringrecirculating ball VPASSteering details
Turns lock-to-lock3.5Turning circle
Suspension frontIndependent, Wishbone (A-arm, control arm), Coil springs, Anti-roll (anti-sway) bar (ARB)Suspension rearLive axle,Trail Radius arms, Coil springs, Anti-roll (anti-sway) bar (ARB)
Wheels frontWheels rear
Tyres frontGR78 x 15Tyres rearGR78 x 15
Brakes frontventilated discBrakes reardrum
Brake diameter front279 mm / 11.0 in / 11.0 inBrake diameter rear
Brakes detailsservo-assistedBraked area

Technical specifications and performance data of Pontiac Bonneville Hardtop Coupé

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