The Mazda RX-7 FB Story

A Sports Car for the People

By the mid-1970s, Mazda’s rotary programme was in crisis. The 1973 oil crisis had devastated sales of rotary-powered cars, the engine’s poor fuel economy, tolerable in an era of cheap petrol, became a serious liability when fuel prices spiked. Mazda had bet heavily on the rotary, installing it in everything from sedans to pickup trucks, and the sudden collapse in demand for thirsty engines nearly bankrupted the company.

The response was a strategic retreat and a tactical masterstroke. Rather than scatter the rotary across the entire lineup, Mazda would concentrate it where it made the most sense: in a dedicated sports car where the engine’s strengths, smooth power, high RPM capability, compact size, and light weight, could be properly exploited. The rotary would be the heart of one exceptional car rather than the engine of many mediocre ones.

The result was the RX-7.

Development

The RX-7 programme began in 1974 under chief engineer Matasaburo Maeda (no relation to the later Mazda design chief Ikuo Maeda, though the coincidence is fitting). The brief was clear: create an affordable, purpose-built sports car that could compete with the Porsche 924 and Datsun 280Z while costing significantly less than either.

The key engineering decision was the front-mid engine layout. The rotary engine, being compact and light, could be positioned behind the front axle line, effectively in the “midship” position despite being in the front of the car. This moved the centre of gravity rearward and inboard, dramatically improving weight distribution. The production FB achieved a near-perfect 50.7:49.3 front-rear weight distribution, better than the Porsche 924 it was targeting.

The body was a clean, aerodynamic hatchback design with pop-up headlights that gave the nose a low, slippery profile. The drag coefficient of 0.36 was competitive for the era. The design was functional rather than flamboyant, crisp lines, minimal ornamentation, and an overall impression of purposeful efficiency.

Weight was kept in check. The production FB weighed approximately 1,050 kg, light even by 1978 standards and dramatically lighter than the Datsun 280Z (which had gained weight steadily through the 1970s). The combination of light weight, good weight distribution, and the rotary’s smooth power made the FB a natural driver’s car.

Launch and Reception

The FB RX-7 launched in Japan in March 1978 and reached Australia later that year. The reception was immediate and enthusiastic. Automotive journalists praised the handling, the engine’s willingness to rev, and the extraordinary value proposition, the FB cost roughly half the price of a Porsche 924 and delivered a comparable driving experience.

The initial engine was the 12A, the proven 1,146cc twin-rotor that had served in the RX-3 and other Mazda models. In the FB, the 12A produced approximately 100hp (74kW), which was modest but adequate given the car’s light weight. The power-to-weight ratio was competitive with the more powerful but heavier competition.

Sales were strong from the start. The FB quickly became Mazda’s global flagship and the car that defined the brand’s identity for a generation of enthusiasts. In Australia, the RX-7 was positioned as an affordable sports car that punched well above its price point, a compelling proposition in a market that valued performance and value equally.

Series Evolution

The FB was produced in three distinct series, each representing incremental improvements:

Series 1 (SA22C, 1978-1980): The original. Powered by the 12A with approximately 100hp. The Series 1 established the template, front-mid engine, rear-wheel drive, hatchback body, pop-up headlights. Equipment levels were modest, reflecting the car’s value positioning. The Series 1 is the purest and lightest FB, but it’s also the least refined.

Series 2 (SA22C, 1980-1983): Incremental improvements to the interior, suspension calibration, and equipment. The 12A engine carried over with minor updates. The Series 2 is a more liveable car than the Series 1, with better sound insulation and improved trim quality. Mechanically, it’s very similar to the Series 1.

Series 3 (FB, 1983-1985): The significant update. The Series 3 received the 13B engine, a 1,308cc twin-rotor producing approximately 135hp (100kW). The additional displacement and torque transformed the car’s character. Where the 12A required revs to produce meaningful acceleration, the 13B provided usable torque across a broader range. The Series 3 also received updated suspension, improved brakes, and a more refined interior.

The Series 3 is widely regarded as the best FB. The 13B engine addressed the 12A’s relative weakness while maintaining the rotary’s smooth, high-revving character. For most buyers, the Series 3 is the FB to own.

Motorsport

The FB RX-7 was a natural racing car. Its light weight, excellent weight distribution, and robust construction made it competitive in virtually every category it entered.

Touring Car Racing: In Australia, the FB competed in the Australian Touring Car Championship and at Bathurst. While it didn’t achieve the outright wins of the RX-3 era (the competition had intensified significantly with cars like the Holden Commodore and Ford Falcon), the FB was a consistent and competitive entrant. Privateer RX-7s were common in state-level touring car racing, where their reliability and relatively low purchase cost made them attractive weapons for budget-conscious racers.

IMSA and International Racing: In the United States, the FB RX-7 became a dominant force in IMSA GTU (Grand Touring Under 2.5L) racing. The rotary’s displacement equivalency (typically calculated at approximately 1.5x the nominal displacement for competition purposes) placed it in classes where its power-to-weight ratio was devastatingly effective. Mazda factory-supported teams won the IMSA GTU championship multiple times with the FB.

Club Racing: The FB became one of the most popular club racing cars in Australia and worldwide. Its combination of affordability (you could buy a competitive race car for less than a new sedan), simplicity (the mechanical layout was straightforward to maintain), and balance (the chassis was forgiving and rewarding simultaneously) made it the default choice for amateur racers looking for their first competition car.

The FB’s racing legacy established a template that subsequent RX-7 generations would follow, the rotary sports car as the accessible, driver-focused alternative to more expensive European machinery.

The Rotary Proposition

The FB crystallised the argument for and against the rotary engine in a way that previous Mazda rotary cars had not. In a purpose-built sports car, the rotary’s advantages, smoothness, compact size, light weight, high RPM capability, were fully exploited. The disadvantages, fuel consumption, apex seal wear, oil consumption, were accepted as trade-offs by a buyer who had specifically chosen a sports car.

This was fundamentally different from putting a rotary in a family sedan or pickup truck, where the fuel consumption was a liability with no corresponding benefit. The FB proved that the rotary engine, in the right application, was not just viable but genuinely superior to the alternatives. No piston engine of equivalent size could match the 12A or 13B’s smoothness and willingness to rev, and no engine of equivalent power was as compact and light.

The FB’s success validated Mazda’s decision to concentrate the rotary in sports car applications and set the direction for the next three decades of Mazda’s rotary programme, the FC, the FD, and eventually the RX-8.

Cultural Impact in Australia

The FB RX-7 arrived in Australia at a pivotal moment. The late 1970s and early 1980s saw Japanese manufacturers challenging the traditional Australian and European dominance of the performance car market. The FB was at the leading edge of this wave, a Japanese sports car that could genuinely compete with European alternatives on driving merit.

For a generation of Australian car enthusiasts, the FB was their first real sports car. It was affordable enough for a young enthusiast to buy, simple enough to maintain and modify at home, and engaging enough to build a lifelong passion around. The rotary community that formed around the FB (and the earlier RX-3) became one of the most dedicated and technically knowledgeable car communities in Australia.

The FB also introduced many Australians to the concept of a lightweight, balanced sports car, the idea that raw power mattered less than weight, balance, and driver engagement. This philosophy, which Mazda would refine to perfection with the MX-5 a decade later, found its first popular expression in the FB RX-7.

Production and End of Life

FB production ran from 1978 to 1985, with approximately 474,000 units produced worldwide across all series and markets. The FB was replaced by the FC (second-generation RX-7) in 1985, which was a larger, more refined, and more powerful car, but also heavier and more complex.

In Australia, the FB was sold in solid numbers throughout its production run. It was a common sight on Australian roads in the 1980s. Today, the surviving population has diminished significantly, rust, racing attrition, and the general wear of daily-driven cars have claimed many examples. Clean, well-maintained FBs are becoming scarce, and values are rising accordingly.

Timeline

Year	Event
1974	RX-7 development programme begins under Matasaburo Maeda
1978	FB RX-7 launched in Japan (March). Series 1 with 12A engine
1978	Australian sales begin. Positioned as affordable sports car
1979	Motor Trend Car of the Year (USA). International acclaim
1980	Series 2 introduced with improved interior and refinement
1980	IMSA GTU racing programme begins. Immediate competitiveness
1982	IMSA GTU championship won by RX-7
1983	Series 3 introduced with 13B engine. Significant performance improvement
1985	FB production ends. Replaced by FC (second-generation RX-7)
1985	Total FB production: approximately 474,000 units worldwide
2000s	FB values begin rising as clean examples become scarce
2010s	Series 3 clean examples cross $15,000 AUD
2020s	The FB is recognised as an affordable entry into rotary sports car ownership