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Mazda RX-7

(1978 model)

Brief specs of 1978 Mazda RX-7

2-door 2+2-seater fixed-head coupé, petrol (gasoline) 2-cylinder rotary (Wankel) engine, 2292 cm3 / 139.9 cu in / 139.9 cu in, 78.3 kW / 105.0 hp / 105.0 hp @ 6000 rpm / 6000 rpm / 6000 rpm, 144.0 N·m / 106.2 lb·ft / 106.2 lb·ft @ 4000 rpm / 4000 rpm / 4000 rpm, manual 5-speed transmission, rear wheel drive, 185 km/h / 115 mph / 115 mph top speed

units: metric UK US

Basic (general) data

Marque (make)MazdaIssued from1978
ModelRX-7Issued until
SerieRX-7Number made
Model familyBody construction
Model codeBody designation
ManufacturerMazda Motor Corp.CountryJP

Bodywork

Base platformNumber of doors2
Bodywork typefixed-head coupéNumber of seats2+2
Bodywork designerCargo capacity (volume)
Passenger space (volume)4160 l / 146.91 cu ft / 146.91 cu ftMax. cargo capacity (volume)

Dimensions & Weight

Length4285 mm / 168.7 in / 168.7 inTotal (curb) weight1024 kg / 2258 lb / 2258 lb
Width1674 mm / 65.9 in / 65.9 inDry weight
Height1270 mm / 50.0 in / 50.0 inLoad capacity
Wheelbase2421 mm / 95.3 in / 95.3 inGross (max.) weight
Track front1420 mm / 55.9 in / 55.9 inTowing weight
Track rear1400 mm / 55.1 in / 55.1 inWeight distribution (front)
Ground clearanceFuel capacity65 l / 14.3 UK gal / 17.2 US gal
Length/wheelbase ratio1.77  

Aerodynamics

Drag coefficient (Cd, Cx, Cw)0.36Frontal area (A)1.81 m2 / 19.5 sq ft / 19.5 sq ft (est.)
Aerodynamic coefficient (Cd×A)0.65 m2 / 7.0 sq ft / 7.0 sq ft (est.)Aerodynamic resistance (Aero horse power) at 100 km/h (62 mph)16.2 kW / 21.7 hp / 21.7 hp (est.)

Engine

Engine CodeTotal number of cylinders2
Engine Typerotary (Wankel) (Inline, 2 cylinder (twin))Total number of valves
Engine ManufacturerMazdaValves per cylinder
Engine constructionBore
Fuelpetrol (gasoline)Stroke
Fuel detailsBore/Stroke ratio
Fuel supply1 Ni carbEngine displacement2292 cm3 / 139.9 cu in / 139.9 cu in
Engine Main bearingsUnitary capacity1146.00 cm3/cylinder / 69.933 cu in/cylinder / 69.933 cu in/cylinder
Cam DesignCompression ratio9.4 : 1
SumpMax. output power78.3 kW / 105.0 hp / 105.0 hp at 6000 rpm / 6000 rpm / 6000 rpm
AspirationnaturalMax. torque144.0 N·m / 106.2 lb·ft / 106.2 lb·ft at 4000 rpm / 4000 rpm / 4000 rpm
Compressor typeN/AMaximum rpm
IntercoolernoMax. net output (power at the wheels)45.4 kW / 60.9 hp / 60.9 hp (est.)
CoolantwaterSpecific output34.2 kW/l / 0.751 bhp/cu in / 0.751 bhp/cu in
Catalytic converternoSpecific torque62.8 N·m/l / 0.55 lb·ft/cu in / 0.55 lb·ft/cu in

Transmission

Transmission typemanualNumber of gears5
Wheel driverear wheel driveTop gear (drive) ratio0.83
  Final gear (drive) ratio3.91

Performance

Acceleration 0-50 mph (80 km/h)Top (maximal) speed185 km/h / 115 mph / 115 mph
Acceleration 0-60 mph (97 km/h)9.50 s / 9.50 s / 9.50 sPower-to-weight ratio102.5 kW/ton / 77.7 bhp/ton / 77.7 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
SteeringSteering details
Turns lock-to-lockTurning circle10.0 m / 32.8 ft / 32.8 ft
Suspension frontSuspension rear
Wheels frontWheels rear
Tyres front185/70-R13Tyres rear185/70-R13
Brakes frontdiscBrakes reardisc
Brake diameter frontBrake diameter rear
Brakes detailsBraked area

Technical specifications and performance data of Mazda RX-7

Infobox

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