Mazda R100

Mazda R100

Manufacturer	Mazda
Production	1968–1973
Class	coupe
Body style(s)	FR coupe
Engine(s)	Wankel engine 0820
Related	Mazda Familia

The Mazda R100 used the chassis from the Familia and the rotary 0820 engine similar to the one used in the Cosmo Sport Series II. It was a 2 door 2+2 coupe and was produced from 1968 to 1973. It was also known as the Familia Presto Rotary and was quite ordinary except for its powerplant. Power was rated at just 100 hp (70 kW) due to a small carburetor (thus the "R100" name).

United States

The R100 was one of the first cars imported into the United States for the new Mazda Motors of America, sold in model years 1971 and 1972. It was a surprising hit with the American public, though sales were limited to some Northwestern states initially.

Racing

Following on the success of the Cosmo Sports at Nürburgring in 1968, Mazda decided to race another rotary car. The Familia Rotary Coupe won its first outing, at the Grand Prix of Singapore, in April, 1969.
Next, the company took on the touring car endurance challenge at Spa, the Spa 24 Hours. For 1969 and 1970, Mazda entered a pair of Familia Rotary Coupes. The cars came fifth and sixth the first year after a quartet of Porsche 911s. The next year, four Familias were present, battling with BMW Alpinas, and Alfa Romeos for the podium. This time, three of the Mazdas were retired, with the fourth claiming the fifth position.
The Familia also placed fifth at the Marathon de la Route at Nürburgring in 1969, the same race that the Cosmo had bowed at the previous year. Finally, Mazda took the Familia home for the Suzuka All-Japan Grand Cup, where it won easily.
For 1970, the Familia placed eighth at the RAC Tourist Trophy in June, fourth at the West German Touring Car race in July, and fifth at Spa, as mentioned above.
Mazda also turned its attention to Le Mans in 1970 with rotary-powered prototypes. The company would finally win that race 21 years later with the 787B.

Data

Technical data Mazda R100 (Manufacturer's figures except where stated)

Mazda R100	Coupe
Produced:	1968 - 1973
Engine:	Two-rotor rotary engine (Wankel-licensed), aluminium rotor chambers, cast iron center and end plates
Bore x Stroke:	Does not apply
Displacement:	984 cc
Max. Power @ rpm:	100 hp (75 kW) @ 7000 (SAE gross)
Max. Torque @ rpm:	125 N·m (92 lb·ft) @ 4000 (SAE gross)
Compression Ratio:	9.4: 1
Fuel feed:	single Hitachi 4bbl-carburetor
Fuel tank capacity:	50 L (13.2 US gal/11.0 imp gal)
Valvetrain:	Does not apply
Cooling:	Water
Gearbox:	Fully synchronized 4-speed-manual with floor mounted lever control & rear wheel drive
Electrical system:	12 volt
Front suspension:	MacPherson struts, coil springs, anti-roll bar
Rear suspension::	Solid axle, semi-elliptical leaf springs
Brakes:	Front discs (9.6 in), rear drums (7.9 x 13 in)
Steering:	Recirculating ball steering
Body structure:	Sheet steel, monocoque (unibody) construction
Dry weight:	913 kg (2013 lb)
Track front/ rear:	1200 mm (47.2 in) 1190 mm (46.9 in)
Wheelbase:	2260 mm (89 in)
Length:	3830 mm (150.8 in)
Width:	1480 mm (58.3 in)
Height:	1345 mm (53 in)
Tyre/Tire sizes:	14 x 4.0“
Top speed (estimate):	177 km/h (110 mph)
0-60 mph (measured):	10.8 sec
Fuel Consumption (measured):	9.8 litres per 100 kilometres (29 mpg-imp/24 mpg-US) − 14.7 litres per 100 kilometres (19.2 mpg-imp/16.0 mpg-US)
Price (USA, MY 1971):	$ 2.495