Key facts

1968 Plymouth GTX Hardtop, 1968 MY information summary

What body style?
fixed-head coupé with 2+2 seats
How long?
5149 mm
How heavy?
1597 kg
What size engine?
7.2 litre, 7206 cm3
How many cylinders?
8, V
How much power?
380 PS / 375 bhp / 280 kW @ 4600 rpm
How much torque?
651 Nm / 480 ft.lb / 66.4 kgm @ 3200 rpm

Plymouth

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1968 Plymouth GTX Hardtop technical specifications

Introduction

The Plymouth GTX Hardtop is a coupé with 2 doors and a front mounted engine which supplies its power through the rear wheels.
It is powered by a naturally aspirated engine of 7.2 litre capacity. This unit features overhead valve valve gear, a 90 degree V 8 cylinder layout, and 2 valves per cylinder. It has an output of 375 bhp (380 PS/280 kW) of power at 4600 rpm, and maximum torque of 651 N·m (480 lb·ft/66.4 kgm) at 3200 rpm.
The engine drives the wheels via a 3 speed automatic set of gears.
It weighs a claimed 1597 kg at the kerb.
1968 Plymouth GTX Hardtop data
1968 Plymouth GTX Hardtop, 1968 MY data
bodywork
Body type2+2 seater fixed-head coupé
Number of doors2
Designer
dimensions & weights
mminches
Wheelbase 2946 116
Track/tread (front) 1521 59.9
Track/tread (rear) 1504 59.2
Length 5149 202.7
Width 1941 76.4
Height 1334 52.5
Ground clearance
length:wheelbase ratio 1.75
Kerb weight 1597 kg 3521 lb
Weight distribution
fuel tank capacity 72.1 litres 15.9 UK Gal 19 US Gal
aerodynamics
Drag coefficient
Frontal area
CdA
engine
engine type naturally aspirated petrol
Engine manufacturer Chrysler
Engine code
Cylinders V 8 in 90° vee
Capacity 7.2 litre
7206 cc
(439.737 cu in)
Bore × Stroke 109.73 × 95.25 mm
4.32 × 3.75 in
Bore/stroke ratio 1.15
overhead valve (OHV)
2 valves per cylinder
16 valves in total
maximum power output
(Gross)
380 PS (375 bhp) (280 kW)
at 4600 rpm
Specific output
(Gross)
52 bhp/litre
0.85 bhp/cu in
maximum torque
(Gross)
651 Nm (480 ft·lb) (66.4 kgm)
at 3200 rpm
Specific torque
(Gross)
90.34 Nm/litre
1.09 ft·lb/cu3
Engine construction
sump
compression ratio 10.1:1
Fuel system
bmep (brake mean effective pressure) 1135.3 kPa (164.7 psi)
Maximum RPM
crankshaft bearings 5
Engine coolant Water
Unitary capacity 900.75 cc
Aspiration Normal
Compressor N/A
Intercooler None
Catalytic converter N
performance
Acceleration 0-80km/h (50mph)
Acceleration 0-60mph
Acceleration 0-100km/h
Acceleration 0-160km/h (100mph)
Standing quarter-mile
Standing kilometre
Maximum speed
Power-to-weight ratio 238.08 PS/g
175.1 kW/g
234.82 bhp/ton
0.1 bhp/lb
Weight-to-power ratio 5.71 kg/kW
9.54 lb/bhp
fuel consumption
Fuel consumption
universal consumption (calculated from the above)
litres per 100km
km per litre
UK MPG
US MPG
Carbon dioxide emissions
Carfolio Calculated CO2 ?
VED band (UK)
CO2 Effizienz (DE)
chassis
Engine position front
Engine layout longitudinal
Drive wheels rear wheel drive  
Torque split N/A
Steering recirculating ball
turns lock-to-lock
Turning circle 12.40 m
Front suspension I.TB.
Rear suspension LA.LS.
Wheel size front
Wheel size rear
Tyres front F70-14
Tyres rear F70-14
Brakes F/R Dr/Dr
Front brake diameter
Rear brake diameter
Gearbox 3 speed automatic
Top gear ratio
Final drive ratio
general
Carfolio.com ID121
Production total 17914
Model code
Model family
RAC rating 59.7
Insurance classification No information available
Tax band No information available
1968 Plymouth GTX Hardtop added 2000-01-02.
Last modified 2013-02-28.

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