1993 Mazda Twin Turbo RX7

Base

R1

Touring / PEG

Wheelbase in.(mm)

95.5 (2425)

95.5 (2425)

95.5 (2425)

Track, Front, in.(mm)

57.5 (1460)

57.5 (1460)

57.5 (1460)

Track, Rear, in.(mm)

57.5 (1460)

57.5 (1460)

57.5 (1460)

Overall Length, in.(mm)

168.5 (4280)

168.5 (4280)

168.5 (4280)

Width, in.(mm)

68.9 (1750)

68.9 (1750)

68.9 (1750)

Height, in.(mm)

48.8 (1230)

48.8 (1230)

48.8 (1230)

Minimum ground clearance, Laden, in.(mm)

4.5 (115)

4.5 (115)

4.5 (115)

Turning circle, curb to curb, ft (m)

35.4 (10.8)

35.4 (10.8)

35.4 (10.8)

Curb Weight, Two Seater, lb (kg) MT

2789 (1265)

2800 (1270)

2862 (1298)

AT

2857 (1296)

N/A

2923 (1326)

Weight Distribution, f/r %

50/50

50/50

50/50

Fuel tank capacity, US.gal. (litres)

20 (76)

20 (76)

20 (76)

Performance

Maximum Speed, mph (km/h)

158 (252)

Acceleration, 0-60 mph, sec.

4.9

Standing 1/4 mile

13.5

Fuel Consumption, miles/gallon (EPA)

MT

AT

City

17

18

Highway

25

24

Combined

23.5

23.4

Engine

Type

Mazda Wankel Rotary, Longitudinal, Front "Midships" (13B-REW)

Number or rotors

2 in line

Generating radius, R, in. (mm)

4.1 (105)

Eccentricity, e, in. (mm)

0.59 (15)

K factor (R/e)

7.0

Width of trochoid chamber, b, in. (cc)

3.1 (80)

Single chamber capacity, cu in. (cc)

40.0 (654.0)

Total cubic capacity, cu in. (cc)

80.0 (1308.0)

Compression ratio

9.0:1

Maximum power, SAE net, bhp

255

@rpm

6500

Maximum torque, SAE net, lb-ft

217

@rpm

5000

Intake port position

2 per chamber, in side housings

Intake port timing

primary port opens, deg ATDC

45

closes, deg ABDC

50

secondary port opens, deg ATDC

32

closes, deg ABDC

50

Exhaust port position

1 per chamber, in trochoid housing (periphrey port)

opens, deg BBDC

75

closes, deg STDC

48

induction system

4-port, dynamic effect induction

Fuel system

Digitally controled EGI-HS fuel injection with twin injectors per chamber.
Bosch L-Jetronic based Speed density system.

Turbocharging

Sequential twin-turbochargers, with electronic boost control
(Twin Hitachi HT12 turbos w/51mm turbine & 57mm compressor)

Turbine diameter, in. (mm)

2.0 (51)

A/R, low-speed passage

0.6 (Pry)

A/R, low- and high-speed passages

0.6 (Sec)

Compressor daimeter, in. (mm)

2.2 (57)

Maximum boost, in. (mm) Hg

22.4 (570)

Intercooler

air to air, in the nose of the car

Ignition system

Electronically controled with triple coils, two spark plugs per rotor chamber, pieeezoelectric knock-sensor

Lubrication system

Force-feed. Direct oil injection to trochoid chambers for lubrication and sealing. Oilcooler (twin for "R" model).

Lubricant capacity, US gal. (litres)

single 1.3 (4.9) twin 1.4 (5.4)

Cooling system

Rotor housings water cooled; twin electric fans (with an auxiliary electric suction fan with airconditioning instalation); aluminium radiator. Rotors oil-cooled.

Coolant capacity, US gal. (litres)

2.3 (8.8)

Drive Train

Manual Transmition

Transmission type

Type R152, 5-speed manual

Clutch type

Single dry plate, diaphragm spring, hydraulically operated with pull-type mechanism

Clutch diameter, outer x inner, in. (mm)

9.3 x 6.3 (236 x 160)

Gearbox type

All synchromesh, with double-cone synchronizers on 2nd and 3rd gears (R type)

Gear ratios

1st

3.483:1

2nd

2.015:1

3rd

1.391:1

4th

1.000:1

5th

0.719:1

rev

3.288:1

Final drive type

Hypoid

Ratio

4.100:1

Limited-slip differemtial

Torsen-type standard

Automatic Transmission

Transmission

R4A-EL electronically-controled,4-speed automatic

Type

Torque converter and planetary-gear automatic

Torque converter

Type-GDD with lockup clutch operatinr in 3rd and 4th

stall rpm

3,000

stall ratio

2.1:1

Gear ratios

1st

3.027:1

2nd

1.619:1

3rd

1.000:1

4th

0.694:1

rev

2.272:1

Final drive ratio

3.909:1

Propeller shaft

Tube in tube construction

Final drive shafts

Equal length haif shafts with constant-velocity joints

Power plant frame

Power train and final drive unit are unitized by Power Plant Frame (PPF)

Chassis and Body

Layout

Front engine Rear wheel drive

Suspension, front

Independent, double-wishbones by unequal length upper and lower arms, coil springs, telescopic dampers, anti-roll bar

Suspention, rear

Independent, double-wishbones by upper A-arms, lower transverse I-arms, transverse toe-control links, trailing links, coil springs, telescopic dampers. anti-roll bar

Steering type

Rack and pinion, engine rpm-sensing, variable hydraulic assistance

Ratio

16.6:1

Turns lock to lock

2.9

Brakes

Front

Ventilated discs with 4-piston, floating calipers

Disc diameter/thickness,in.(mm)

11.6 (294)/.5 (11.6)

Pad area, sg in.(cm2)

14 (90)

Rear

Ventilated discs with single-piston

Disc diameter/thickness,in.(mm)

11.6 (294)/.5 (11.6)

Pad area, sg in.(cm2)

10 (64)

Vacuum servo

8" + 8" Mastervac vacuum servo

ABS

4-sensor, 3-channel anti-lock brake system standard

Wheels

Squeeze-cast aluminium wheels, 16 x 8JJ

Tires

225/50VR16 (Base) 225/50ZR16 (R1) 225/50VR16 (Touring)

Body

"Space-Monocoque" steel, welded body with aluminium hood