Вартість Mazda RX-7 бу

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Автомобілі Мазда РХ-7 за ціною

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Mazda RX-7’s Atypical Engine Increased HP

The RX-7 bucked convention for a more adventurous Wankel rotary engine, which gave the sports car up to 252 HP and an exclusive driving experience.

Key Points

• Mazda produced three generations of the RX-7, featuring three different major rotary engines.
• Turbocharged versions of the engines became available in the second and third generations.
• 12A-equipped cars produced 100 horsepower, and 13B-equipped vehicles got 146 to 160 horsepower.
• Turbocharged models saw power increase to 182 to 200 horsepower.
• 13B-REW engines were the first mass-produced sequential twin-turbocharged systems to be exported from Japan.
• The rotary engine hasn’t been in a production vehicle since 2012, but MX30 will have a rotary hybrid option.

1.3L Wankel Rotary Engine Delivered Affordable Exotic Car-like Performance

The Mazda RX-7 debuted in 1978 and remained a popular vehicle for nearly 25 years because of its strategic weight distribution, wide array of modifications, and mostly, its unique rotary engine. When it came to the RX-7, Mazda steered from convention and toward the more adventurous 1.3L Wankel rotary engine.

The Rx-7 was a successor to a long line of rotary-powered Mazdas. Like the Mazda Luce, Cosmo, and RX-3 that came before it, the RX-7 used this simple engine to provide an exclusive driving experience only found within the Mazda brand. The new rotary-powered platform allowed enthusiasts to drive what felt like an exotic car but without breaking the bank.

With competition from the Nissan GTR and Toyota Supra, the Mazda RX-7 had its work cut out for it. Fusing supercar-level handling with a lightweight two-door coupe design made the RX-7 stand out from the start. But what gave the RX-7 its legendary status?

1.2L 12A and 1.3L 13B Engines Made RX-7 a Strong Sports Car Contender

Clearly, the RX-7’s small size and perfect 50/50 weight distribution played a huge part in why it became and remains a beloved sports car. However, the most important factor lies under the hood of the Mazda RX-7.

The fast-revving 1.3-liter two-rotor engine, formally known as the 13B, makes the RX-7 come alive. With a piercing 8,000 rpm redline, the rotary engine sings happily through every gear.

While the first-generation RX-7 engines were offered in a 1.2-liter configuration, known as the 12A, the true hero that keeps the rotary community alive is the 13B. But it is a bit sluggish in lower rpm driving, which means you can enjoy wringing out each gear without the worry of damaging the engine.

Over the years, the Mazda RX-7 has had a few variants of the 13B available. Here, we’ll provide a breakdown of the 12A and 13B rotary engines.

RX-7’s First-gen. 12A Engine Offered 100 HP, Respectable EPA Ratings

The first generation (1978-1985) of the Mazda RX-7 came with the 12A rotary engine under the hood. They were available with a four-speed manual or three-speed automatic transmission. Later year models were offered with five-speed manual or four-speed automatic transmissions.

The 12 in 12A tells you it is a two-rotor engine with a displacement of 1.2 liters. Due to how a rotary engine produces power, it can produce one and a half times more power than a piston engine of the same liter.

Power output stayed relatively the same throughout the years the 12A engine was offered in the RX-7. As a carbureted two-rotor, the 12A produced 100 horsepower and 105 lb.-ft. of torque. The rotary’s biggest advantage is how smooth the combustion cycle is. Being able to rev up to 8,000 rpm with ease made for a smooth power band in every gear.

While it was only offered in the Japanese market, late model first-generation RX-7s received a turbocharged version of the 12A. These models were referred to as the Savanna RX-7 Turbo and produced 163 horsepower. However, this turbo model would be short-lived, as the next generation of RX-7 would be announced just after.

Second-gen. Added New 13B Engine, Amped Up Output to 160 HP

For the second generation (1985-1992) of the RX-7, Mazda upgraded the rotary engine platform and the chassis. The new 13B rotary engine would see the addition of electronic fuel injection, better rotor seals, and newly machined housings to increase displacement to 1.3 liters.

These improvements saw a power increase from 100 to 146 horsepower and 105 to 135 lb.-ft. of torque. The naturally aspirated 13B would stay relatively the same until late model (Series 5 as they’re referred to) cars. A late-model 13B would gain power from better engine management, lighter rotors, and a higher compression ratio of 9.7:1. As a result, power increased from 146 horsepower to 160.

After the success of the first-generation turbo engine for the Japanese market, Mazda saw fit to develop a turbo 13B engine for other markets. Thus, during the Chicago Auto Show in 1986, Mazda announced the RX-7 Turbo II. The Turbo II engine would produce 182 horsepower and 183 lb.-ft. of torque at only 3,500 rpm. These turbo models were very sought after, especially by enthusiasts, meaning the ones you find used are more likely to be taken care of.

Third-gen. RX-7 Entered ’90s with 13B-REW Engine with Twin Turbos and 252 HP

The third generation (1992-2002) of the Mazda RX-7 was released in 1992 and was the first model year to have the 13B-REW. Built upon the same platform as the previous generation, the REW now came standard with twin turbos.

Mazda’s 13B-REW was the first-ever mass-produced sequential twin-turbo system to be exported from Japan. The system would use a small turbo to add boost pressure at lower rpm, then switch to a larger turbo to add boost pressure at higher rpm. Although, the engine would use a complicated rubber hose vacuum system which will fail over time.

All of this new technology would prove beneficial for the 13B engine, as power would increase from 182 horsepower in the Turbo II to 252 horsepower in the new FD RX-7. In addition, torque numbers would increase to 218 lb.-ft., largely due to the smaller sequential turbo.

Impressively, even with more power and complicated emissions, the gas mileage of the last generation RX-7 went up. The new engine helped the RX-7 reach EPA ratings of 18 mpg city and 24 mpg highway.