Mazda RX 7 IV Wankel 1.3 (265 Hp) 2000

Key specs

Mazda RX-7 (Coupe) RX 7 IV 2000,2001,2002

What is the body type, Mazda RX 7 IV Wankel 1.3 (265 Hp) 2000?

Coupe, 2 Doors, 4 Seats

How much power, Mazda RX 7 IV Wankel 1.3 (265 Hp) 2000?

265 Hp @ 6500 rpm.
202.6 Hp/l

How fast is the car, Mazda RX 7 IV Wankel 1.3 (265 Hp) 2000?

250 km/h 155.34 mph

What is the engine size, Mazda RX 7 IV Wankel 1.3 (265 Hp) 2000?

1308 cm3
79.82 cu. in.

How many cylinders, Mazda RX 7 IV Wankel 1.3 (265 Hp) 2000?

Rotary, Rotary (Wankel)

What is the drivetrain, Mazda RX 7 IV Wankel 1.3 (265 Hp) 2000?

Rear wheel drive,

How long is this vehicle, Mazda RX 7 IV Wankel 1.3 (265 Hp) 2000?

4285 mm
168.7 in.

How wide is the vehicle, Mazda RX 7 IV Wankel 1.3 (265 Hp) 2000?

1760 mm
69.29 in.

What is the curb weight, Mazda RX 7 IV Wankel 1.3 (265 Hp) 2000?

1240 kg
2733.73 lbs.

Mazda RX-7 (Coupe) RX 7 IV 2000,2001,2002 Specs

General information

Brand Mazda
Model RX-7 (Coupe)
Version RX 7 IV
Engine version Wankel 1.3 (265 Hp)
Year production start 2000
Year production end 2002
Vehicle type Coupe
Horsepower RPM 265 Hp @ 6500 rpm.
Curb weight kg -lbs total

1240 kg

2733.73 lbs.
Overall length mm - inch

4285 mm

168.7 in.
Doors 2
Top Speed 250 km/h 155.34 mph

Engine specs

Engine position and orientation Front, Longitudinal
Cylinders Rotary
Position of cylinders Rotary (Wankel)
Displacement (liters)

1308 cm3

79.82 cu. in.
Eng. horsepower RPM 265 Hp @ 6500 rpm.
Horsepower per litre 202.6 Hp/l
Weight / horsepower kg/hp - hp/tons

4.7 kg/Hp

213.7 Hp/tonne
Weight / torque kg/Nm - Nm/tons 4.2 kg/Nm, 237.1 Nm/tonne

4.2 kg/Nm

237.1 Nm/tonne
Torque Nm RPM lb-ft RPM

294 Nm @ 5000 rpm.

216.84 lb.-ft. @ 5000 rpm.
Compression ratio 9.1
Fuel delivery system Multi-point indirect injection
Fuel type Petrol (Gasoline)
Engine aspiration Naturally aspirated engine
Powertrain architecture Internal Combustion engine
Engine location Front, Longitudinal

Transmission and Drive system

Drive configuration Rear wheel drive
Transmission 5

Brakes

Front brakes Ventilated discs
Rear brakes Ventilated discs
Anti-lock brake system ABS (Anti-lock braking system)

Steering

Steering type Steering rack and pinion

Suspension

Front suspension Double wishbone
Rear suspension Helical spring

Body / Chassis

Wheels & Tyres

Wheels size 225/50 R16
Wheels rims 16

Exterior

Interior

Safety and Security

Passenger

Passengers seats 4

Dimensions

Overall length mm - inch

4285 mm

168.7 in.
Overall width mm -inch

1760 mm

69.29 in.
Overall height mm -inch

1230 mm

48.43 in.
Wheelbase mm - inch

2425 mm

95.47 in.
Track width front mm - inch

1460 mm

57.48 in.
Track width rear mm - inch

1460 mm

57.48 in.

Weights

Curb weight kg -lbs total

1240 kg

2733.73 lbs.
Gross weight kg -lbs total

1490 kg

3284.89 lbs.
Capacities kg - lbs

250 kg

551.16 lbs.
Fuel tank liters | gallons

76 l

20.08 US gal | 16.72 UK gal

Fuel economy

Engine type

Rotary (Wankel)
What engine is the Wankel: the Wankel engine is a type of internal combustion engine using an eccentric rotary design to convert pressure into rotating motion.

What is the Wankel displacement: it is in a range between 1308 cc and 3924 cc. The displacement given in engine specifications is typically for only one face of one
rotor (a single working chamber), or one face multiplied by the number of rotors; however, all three faces of all rotors are working at the same time.

How much is the power of the Wankel engine: the power of the Wankel engine is in a range from 150 bhp to 280 bhp.
Which cars use Wankel engine: in recent production only Mazda on RX7, RX8 and Eunos Cosmo models.

Compared to the reciprocating piston engine, the Wankel engine has more uniform torque; less vibration; and, for a given power, is more compact and weighs less.
The rotor, which creates the turning motion, is similar in shape to a Reuleaux triangle, except the sides have less curvature. Wankel engines deliver three
pulses per revolution of the rotor using the Otto cycle. However, the output shaft uses toothed gearing to turn three times faster giving one power pulse per
revolution. In one revolution, the rotor experiences power pulses and exhausts gas simultaneously, while the four stages of the Otto cycle occur at separate times.
For comparison, in a two-stroke piston engine there is one power pulse for each crankshaft revolution (as with a Wankel engine output shaft) and, in a four-stroke
piston engine, one power pulse for every two revolutions.
The four-stage Otto cycle of intake, compression, ignition, and exhaust occurs each revolution of the rotor at each of the three rotor faces moving inside the
oval-like epitrochoidal housing, enabling the three power pulses per rotor revolution.


In the Wankel engine, the four strokes of an Otto cycle occur in the space between each face of a three-sided symmetric rotor and the inside of a housing.
The oval-like epitrochoid-shaped housing surrounds a triangular rotor with bow-shaped faces similar in appearance to a Reuleaux triangle.

The central drive shaft, called the eccentric shaft or E-shaft, passes through the center of the rotor being supported by fixed bearings.
The rotors ride on eccentrics (analogous to crankpins in piston engines) integral to the eccentric shaft (analogous to a crankshaft).
The rotors both rotate around the eccentrics and make orbital revolutions around the eccentric shaft. Seals at the apices of the rotor seal against the periphery
of the housing, dividing it into three moving combustion chambers.
Wankel engines ideally can reach much higher engine revolutions than reciprocating engines of similar power output.
This is due partly to the smoothness inherent in its circular motion, lack of a mechanical valvetrain employing reciprocating poppet valves and the rotor spinning at one third of the speed of the output shaft.

The design was conceived by German engineer Felix Wankel. Wankel received his first patent for the engine in 1929. He began development in the early 1950s at NSU,
completing a working prototype in 1957. NSU subsequently licensed the design to companies around the world, that have continually made improvements.
In 1951, NSU Motorenwerke AG in Germany began development of the engine, with two models being built.
Mazda and NSU signed a study contract to develop the Wankel engine in 1961 and competed to bring the first Wankel-powered automobile to market.
After years of development, Mazda's first Wankel-engine car was the 1967 Cosmo 110S.
The company followed with a number of Wankel (rotary in the company's terminology) vehicles, including a bus and a pickup truck. Mazda later abandoned the Wankel in most of their automotive designs, continuing to use the engine in their sports car range only, producing the RX-7 until August 2002. The company normally used two-rotor designs. A more advanced twin-turbo three-rotor engine was fitted in the 1991 Eunos Cosmo sports car. In 2003, Mazda introduced the Renesis engine fitted in the RX-8. The Renesis engine relocated the ports for exhaust from the periphery of the rotary housing to the sides, allowing for larger overall ports, better airflow, and further power gains. The Renesis is capable of 238 hp (177 kW) with improved fuel economy, reliability, and lower emissions than previous Mazda rotary engines, all from a nominal 1.3-L displacement, but this was not enough to meet more stringent emissions standards. Mazda ended production of their Wankel engine in 2012 after the engine failed to meet the more stringent Euro 5 emission standards, leaving no automotive company selling a Wankel-powered vehicle.
The company is continuing development of the next generation of Wankel engines, the SkyActiv-R. Mazda states that the SkyActiv-R solves the three key issues with
previous rotary engines: fuel economy, emissions, and reliability.

Racing: in the racing world, Mazda has had substantial success with two-rotor, three-rotor, and four-rotor cars. Mazda was the first team from outside Western Europe
or the United States to win Le Mans outright with the most outstanding racing car ever built the 787B.
It was also the only non-piston engined car to win Le Mans, which the company accomplished in 1991 with their four-rotor 787B (2.622 L or 160 cu in—actual displacement,
rated by FIA formula at 4.708 L or 287 cu in).

Source:
https://en.wikipedia.org/wiki/Wankel_engine
https://www.libralato.co.uk/technology/wankel.html
https://www.mazda.com/en/innovation/lemans30th/r26b/

edited by arrabbiata

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