Mazda RX7 Horsepower & Specs Explained

The question of "What is the horsepower of a Mazda RX7?" often leads to a fascinating discussion about two distinct, yet similarly named, Japanese sports cars: the Mazda RX7 and the Mazda Miata (often mistakenly referred to as the Mazda Miata RX7 in some contexts). While both are celebrated for their performance and driving dynamics, they cater to slightly different preferences and offer unique experiences. This article will delve into the specifications of both the Mazda RX7 and the Miata, clarifying their differences, highlighting their respective horsepower figures, and exploring what makes each a legend in its own right.

Understanding the Mazda Lineup: RX7 vs. Miata

Mazda Motor Corporation has produced a range of iconic vehicles, and among their most beloved are the RX7 and the Miata. It's crucial to distinguish between these two models, as the provided text sometimes conflates them or uses the term "Mazda Miata RX7" loosely. The Mazda RX7 is a distinct lineage of sports cars, known for its innovative rotary engines. The Mazda Miata, on the other hand, is a lightweight, affordable, rear-wheel-drive roadster that has enjoyed immense popularity globally. While they share the Mazda badge and a sporting ethos, their engineering and intended purpose differ significantly.

Mazda RX7: The Rotary Revolution

The Mazda RX7 is perhaps best known for its pioneering use of the Wankel rotary engine. This unique engine design, which uses a spinning triangular rotor instead of reciprocating pistons, allows for a compact, high-revving, and smooth power delivery. The RX7 has a rich history, with its first production model launched in 1978. It quickly became Mazda's flagship sports car, achieving significant success both on the road and on the track, including a notable win at the prestigious Le Mans race – a feat unmatched by any other rotary-powered vehicle.

Generations and Horsepower

The RX7 has seen several generations, each evolving the design and performance:

• First Generation (SA/FB, 1978-1985): Initially powered by a 1.1-litre 12A rotary engine, producing around 100-135 horsepower depending on the market and specific model.
• Second Generation (FC, 1985-1992): This generation saw the introduction of the more powerful 13B rotary engine. Naturally aspirated versions produced around 160-185 horsepower, while the turbocharged models offered a significant boost, ranging from 200 to 220 horsepower.
• Third Generation (FD, 1992-2002): The FD RX7 is the most iconic and sought-after. It featured an advanced twin-sequential turbocharged 13B-REW rotary engine. Early models typically produced around 252 horsepower, with later revisions increasing this to 265 horsepower in most markets. Some special editions, like the Spirit R, offered slightly more power. The FD RX7 is famed for its exceptional handling, aerodynamic design, and a power-to-weight ratio that made it a formidable performance car.

Reliability and Maintenance of the RX7

The rotary engine, while brilliant in concept, has historically presented unique maintenance challenges. Apex seals, crucial components within the rotary design, are often cited as a potential weak point. Regular maintenance, proper warm-up and cool-down procedures, and diligent monitoring of oil levels and coolant are paramount for the longevity of an RX7, particularly the FD generation. Issues like overheating and oil consumption can arise if these procedures are neglected. Many owners opt for "reliability mods," such as upgraded intercoolers, aluminium radiators, and improved cooling systems, to enhance durability. Despite these considerations, a well-maintained rotary engine can achieve significant mileage, with some estimates suggesting well over 150,000 miles are achievable with diligent care. However, engine rebuilds can be costly, often ranging from £1,500 to £2,000 (or equivalent) for apex seal replacement.

RX7 Performance and Cost

The Mazda RX7, especially the FD generation, is renowned for its exceptional handling and performance capabilities. Its compact rotary engine contributes to a favourable weight distribution and a low centre of gravity. However, this performance comes at a price. Used FD RX7 models can command significant sums, with prices varying wildly based on condition, mileage, and originality. Low-mileage, pristine examples can fetch upwards of £40,000-£50,000 (or more), while modified or higher-mileage cars might be found in the £20,000-£30,000 range.

Mazda Miata (MX-5): The Accessible Roadster

The Mazda Miata, officially known as the Mazda MX-5, is a different proposition altogether. Launched in 1989, it was conceived as an affordable, lightweight, rear-wheel-drive sports car that captured the spirit of classic British roadsters. Its primary focus is on driving enjoyment, nimble handling, and open-top motoring. Unlike the RX7, the Miata typically uses conventional inline-four piston engines.

Miata Engine and Horsepower

The Miata has also evolved through several generations:

• First Generation (NA, 1989-1997): The original Miata was equipped with a 1.6-litre B-series engine producing approximately 116 horsepower. Later models in some markets received a 1.8-litre engine, increasing output to around 128-133 horsepower.
• Second Generation (NB, 1997-2005): The NB generation featured updated 1.6-litre and 1.8-litre engines, with power outputs ranging from 116 to 145 horsepower. The special Mazdaspeed MX-5 model featured a turbocharged 1.8-litre engine, producing around 178 horsepower.
• Third Generation (NC, 2005-2015): This generation saw larger engines, with the 2.0-litre MZR engine delivering around 160-170 horsepower.
• Fourth Generation (ND, 2015-Present): The current generation's 2.0-litre Skyactiv-G engine produces approximately 181 horsepower.

Miata's Driving Experience and Affordability

The Miata's appeal lies in its pure driving experience. Its lighter weight, balanced chassis, and communicative steering make it incredibly engaging to drive, even with modest horsepower figures. It offers a more relaxed and accessible driving experience compared to the high-strung nature of the RX7. Furthermore, the Miata is significantly more affordable to purchase and maintain. Its conventional engines are generally reliable and easier to service, with parts readily available. Used Miata models are widely available and represent excellent value for money, with prices typically ranging from £3,000 to £15,000 depending on age, condition, and generation.

Direct Comparison: RX7 vs. Miata

Here's a comparative look at the key aspects:

Frequently Asked Questions

Is the Mazda RX7 the same as the Mazda Miata?

No, they are distinct models. The RX7 is a sports car known for its rotary engine and higher performance, while the Miata (MX-5) is a lightweight roadster focused on accessible driving fun.

What is the horsepower of a Mazda RX7?

The horsepower of a Mazda RX7 varies by generation. The first generation (SA/FB) had around 100-135 hp, the second generation (FC) had 160-220 hp, and the iconic third generation (FD) produced 252-265 hp from its twin-turbo rotary engine.

What is the horsepower of a Mazda Miata?

The Mazda Miata's horsepower also varies by generation. The original NA Miata (1989-1997) had 116 hp from its 1.6-litre engine, with later 1.8-litre models offering around 128-133 hp. Subsequent generations have seen power figures increase, with the current ND model producing around 181 hp.

Is the RX7 reliable?

The reliability of an RX7, particularly the FD generation, depends heavily on maintenance. Rotary engines require specific care, and issues like apex seal wear and overheating can occur if not properly maintained. However, a well-cared-for RX7 can be reliable, but it generally demands more attention and potentially higher maintenance costs than a Miata.

Can you convert a Miata to an RX7?

While enthusiasts can perform complex engine swaps, a direct conversion from a Miata to an RX7 is not practical or common due to the fundamental differences in their platforms and engines. However, it is possible to swap a rotary engine into a Miata chassis, though this is a highly involved custom project.

Conclusion

The Mazda RX7 and Mazda Miata represent different facets of Mazda's sporting heritage. The RX7, with its groundbreaking rotary engine and potent performance, is a legend for enthusiasts seeking thrilling speed and a unique mechanical experience. The Miata, on the other hand, offers a more accessible and pure driving pleasure, celebrated for its lightweight agility and open-top freedom. While the RX7's horsepower figures, particularly in the FD generation (around 255 hp), are significantly higher than the Miata's (typically between 116 hp and 181 hp), both cars deliver an engaging driving experience that has cemented their status as automotive icons.