The Mazda RX-7 FC Story

The Sophistication Jump

The first-generation RX-7 (FB) had proven that a rotary engine belonged in a sports car. It was light, engaging, and affordable. But by the mid-1980s, the sports car market was evolving rapidly. Porsche had moved upmarket with the 944, Toyota was developing the Supra, and Nissan’s 300ZX was pushing the boundaries of Japanese GT cars. Mazda needed the second-generation RX-7 to compete not just on driving purity but on refinement, performance, and technology.

The result was the FC, a car that represented a quantum leap in ambition from the FB. It was larger, heavier, and significantly more expensive. It offered turbocharging, electronic fuel injection, independent rear suspension (on the Turbo model), and a level of cabin refinement that put it firmly in grand tourer territory. The FC was Mazda’s statement that the RX-7 was not just an affordable sports car but a genuine competitor to the Porsche 944 and the emerging Japanese GT class.

Development

The FC programme began in the early 1980s under chief engineer Akio Uchiyama. The brief was to create a sports car that could match the Porsche 944 in performance and refinement while remaining distinctly Mazda, which meant rotary power, outstanding handling, and a price advantage over its German rival.

The most significant engineering decision was turbocharging. The FB had relied on the naturally aspirated 12A and 13B, which produced adequate but unexceptional power. For the FC, Mazda developed a turbocharged version of the 13B that produced 150kW (200hp), a 50% increase over the FB’s best engine. The turbo 13B used a single Hitachi HT18S turbocharger, an air-to-air intercooler, and electronic fuel injection (replacing the FB’s carburettor). The result was a powertrain that combined the rotary’s inherent smoothness with meaningful straight-line performance.

The chassis was equally ambitious. While the NA model retained a semi-trailing arm rear suspension similar to the FB’s layout, the Turbo II received a sophisticated aluminium multi-link independent rear suspension (IRS). This was a significant investment, the IRS was more complex, more expensive to manufacture, and added weight compared to a live axle setup. But the handling benefits were transformative: the Turbo II could change direction with a fluidity and precision that the live-axle FB could not match.

The body was designed by the Mazda design team and styled with input from US-based Mazda designers. The result was a clean, contemporary shape that was unmistakably an evolution of the RX-7 lineage, pop-up headlights, hatchback body, and an aerodynamic profile (Cd 0.31) that was significantly more slippery than the FB. The FC was wider and longer than the FB, reflecting its move upmarket.

Launch and Market Position

The FC launched in Japan in October 1985 and reached Australia in 1986. The range included naturally aspirated and turbocharged models, with a convertible added later. In Australia, the FC was positioned as a premium sports car, priced above the FB but below European competitors like the Porsche 944 and BMW Z1.

The reception was positive. Automotive journalists praised the Turbo II’s performance, noting that the turbocharged 13B delivered power with a smoothness that turbocharged piston engines of the era could not match. The rotary’s inherent lack of vibration, combined with the turbo’s boost, created a powertrain that felt effortlessly fast rather than aggressively powerful.

The handling was equally well-received. The Turbo II’s IRS gave the car a rear-end stability and composure that the FB’s live axle lacked, particularly over rough surfaces. The steering feel was excellent, direct, well-weighted, and communicative. The FC was a car that rewarded smooth, precise inputs and punished ham-fisted driving, exactly the character that rotary enthusiasts appreciated.

Sales in Australia were solid. The FC attracted a broader buyer demographic than the FB, older buyers who valued refinement and comfort alongside performance. The convertible model, introduced in 1988, expanded the FC’s appeal further.

Series Evolution

The FC underwent continuous development throughout its production run:

Series 4 (1986-1989): The initial FC. Available as NA and Turbo II coupe. The Turbo II established the FC’s performance credentials with its 150kW engine, IRS, LSD, and four-wheel disc brakes. Equipment levels were higher than the FB, with standard air conditioning, power windows, and a more refined interior.

Series 5 (1989-1992): The updated FC with revised engine management (improved fuel injection calibration), updated interior trim, and refined suspension tuning. The Series 5 is considered the most refined FC and commands a slight premium in the used market. The convertible was available in both NA and Turbo II form by this stage.

Infini/Anfini (Japan-market): Japanese-market FC models included the Infini badge (Mazda’s luxury sub-brand) and offered higher specification levels. Some Infini models were imported to Australia as grey imports and are identifiable by their trim levels and badging.

Turbocharging the Rotary

The FC was Mazda’s first turbocharged production rotary, and the engineering challenge was significant. The rotary engine’s combustion characteristics differ from a piston engine: the long, narrow combustion chamber, the high exhaust gas temperatures, and the engine’s sensitivity to detonation all complicated turbo integration.

Mazda’s solution was conservative and effective. The single Hitachi HT18S turbocharger was sized for mid-range responsiveness rather than peak power, and the boost level was factory-set at a moderate 6-7 psi. An air-to-air intercooler reduced charge temperatures, and the electronic fuel injection system provided the precision fuelling that the rotary required under boost.

The result was a turbo system that enhanced the 13B’s character rather than transforming it. Where many turbocharged piston engines of the era suffered from brutal turbo lag and an on-off power delivery, the FC Turbo’s boost came in progressively from around 3,000 rpm and built smoothly to the redline. The rotary’s inherent smoothness meant that the turbo’s contribution blended seamlessly with the engine’s natural power delivery.

This approach, using turbocharging to enhance the rotary’s strengths rather than mask its weaknesses, would be refined to perfection in the FD’s sequential twin-turbo system.

Motorsport

The FC continued the RX-7’s motorsport tradition, though the landscape had changed significantly from the FB era.

IMSA GTO/GTU: In the United States, Mazda continued its IMSA programme with the FC. The turbocharged 13B was the basis for the IMSA GTO-class racing engine, which was developed to produce well over 300hp in race trim. The FC’s wider body and more aerodynamic shape made it a better race car than the FB, and Mazda achieved continued success in the IMSA series.

Australian Racing: In Australia, the FC was campaigned in various categories including state-level touring car events and production car racing. The Turbo II’s combination of rotary power and sophisticated chassis made it competitive, though the car’s weight relative to the FB meant it was less dominant in classes where power-to-weight was critical.

Privateer Racing: The FC became a popular choice for club-level motorsport in Australia. The turbo model’s performance, the chassis’s predictable handling, and the availability of performance parts made it a natural race car. Many FCs were converted from road cars to dedicated track machines, and the car’s IRS rear end was particularly valued for its composure and adjustability.

The FC also found success in time attack and hill climb events, where the turbo 13B’s compact size and power potential made it a favourite for heavily modified builds.

The Convertible

The FC convertible was introduced in 1988 and marked the first open-top RX-7. Based on the coupe platform with significant structural reinforcement (additional bracing in the sills, A-pillars, and rear bulkhead), the convertible offered the rotary sports car experience with wind in the hair.

The convertible was available in both NA and Turbo II form. The added weight of the structural reinforcement (approximately 80-100 kg over the coupe) and the slightly reduced chassis rigidity meant the convertible was not as sharp-handling as the coupe, but it was a comfortable and enjoyable touring car.

In Australia, the FC convertible was sold in small numbers and has become a desirable variant for collectors and enthusiasts who value open-air rotary motoring. Values are comparable to the coupe, with well-preserved examples commanding slight premiums.

Cultural Significance

The FC occupied an interesting position in car culture. It was overshadowed in popular imagination by the RX-3 (with its Bathurst heritage), the FB (with its accessible purity), and the FD (with its stunning beauty). The FC was the “sensible” RX-7, the one that grew up, put on a suit, and got a proper job.

But among enthusiasts who value the complete package, performance, comfort, refinement, and daily usability, the FC is increasingly appreciated. It’s the RX-7 you can drive across the country in comfort, the one that your partner doesn’t mind riding in, and the one that still delivers genuine thrills when the road gets interesting.

The FC also played a crucial role in advancing rotary engine technology. The turbocharging, electronic fuel injection, and sophisticated chassis engineering developed for the FC directly informed the FD programme. Without the FC’s technological foundations, the FD would not have been possible.

Production and End

FC production ran from 1985 to 1992, with approximately 272,000 units produced worldwide. The FC was replaced by the FD (third-generation RX-7) in 1992, a car that would become one of the most celebrated sports cars of its era.

In Australia, the FC sold steadily throughout its production run. The Turbo II was the aspirational model, while the NA provided affordable RX-7 ownership. The convertible filled a niche that no other Japanese manufacturer was serving at the time.

Today, the surviving FC population has diminished through natural attrition, racing use, and the general wear of cars that were used as daily transport for many years. Clean, well-maintained Turbo IIs are becoming scarce, and values are beginning to rise as the market recognises the FC’s quality and desirability.

Timeline

Year	Event
1982	FC development programme begins under Akio Uchiyama
1985	FC RX-7 launched in Japan (October). NA and Turbo II models
1986	Australian sales begin. Turbo II is the flagship model
1987	IMSA racing programme continues with FC platform
1988	Convertible model introduced. Available as NA and Turbo II
1989	Series 5 update: revised engine management, interior, and suspension
1989	FD development programme begins, the FC’s successor takes shape
1991	FD RX-7 debuts in Japan. FC continues alongside in some markets
1992	FC production ends. Total production: approximately 272,000 units
2000s	FC values remain affordable. Clean Turbo IIs available for $5,000-10,000
2010s	Values begin rising. Clean Turbo IIs cross $15,000 AUD
2020s	FC Turbo IIs recognised as exceptional value. Clean examples $15,000-30,000