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TorqueList Garage Reference Series

Volume 1 · Mazda

Engine
Reference Catalog

Factory specifications, architecture, key variants, engineering notes, racing history and the stories that made Mazda's most important engines matter.

Technical reference•Historical context•Builder notes•Print ready

Edition 1.0 · September 2026 · Published

Public preview · first 3 engine profiles unlocked

15

Detailed engine profiles

14/15

Commercially cleared photos

37

Source references

V1

9 engine families

Publication notice

Independent TorqueList reference

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Accuracy

Specifications can vary by model year, application, option code, market, and production revision. Verify critical service, purchasing, racing, and installation information against the exact factory documentation for the specific vehicle or engine before relying on it.

Media policy

Third-party photographs appear only when their commercial-use basis is recorded. Creator, source, and license information is retained with each approved image. Engines without an approved third-party photograph use TorqueList-owned original technical artwork.

Contents

Mazda Engine Reference — Volume 1

Profiles are organized by engine family and pull from the same published TorqueList Engine Library used by the web experience.

Mazda Rotary

5 profiles
Mazda 10A Rotary1967–1972 core production era
59.9 ci
Mazda 12A Rotary1970–1985 core production era
69.9 ci
Mazda 13B-REW1991–2002
79.8 ci
Mazda 13B-MSP RENESIS2003–2012 production era
79.8 ci
Mazda 20B-REW1990–1995
119.7 ci

Mazda Racing Rotary

1 profiles
Mazda R26B Four-Rotor1991 competition specification
159.6 ci

Mazda B-Series Four

1 profiles
Mazda B6-ZE 1.61989–1993 core MX-5 era
97.5 ci

Mazda BP Four

2 profiles
Mazda BP-ZE 1.81993–2005 MX-5 family era
112.2 ci
Mazda BPT 1.8 Turbo1989–1994 core Familia performance era
112.2 ci

Mazda K-Series V6

1 profiles
Mazda KL-ZE 2.5 V61990s core era
152.5 ci

Mazda MZR DISI Turbo

1 profiles
Mazda L3-VDT 2.3 DISI Turbo2005–2013 performance application era
138 ci

Skyactiv-G

2 profiles
Mazda PE SKYACTIV-G 2.02011–present family era
122 ci
Mazda PY-VPS SKYACTIV-G 2.52012–present family era
151.9 ci

Skyactiv-G Turbo

1 profiles
Mazda PY-VPTS SKYACTIV-G 2.5 Turbo2016–present family era
151.9 ci

Skyactiv-D

1 profiles
Mazda SH-VPTS SKYACTIV-D 2.22012–present family era depending market
133.7 ci
15/15 profiles include reference sources.
Every engine has artwork; rights-cleared real photos replace TorqueList original technical art as they are approved.
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01

TorqueList Technical Reference

Mazda Rotary

Full web profile

Mazda 10A Rotary

The compact twin-rotor engine that launched Mazda's production rotary era and later went racing at Le Mans.

Mazda 10A Rotary engine

Mazda 10A Rotary enginePhoto: TTTNIS — CC0 1.0 — via Wikimedia Commons · source · license

★

Why it matters

Key takeaway

The 10A proved Mazda could mass-produce Felix Wankel's rotary concept reliably enough for road cars, establishing an engine architecture that would define the brand for decades.

Engineering

Technical specification

Architecture
Twin-rotor Wankel rotary
Block
Aluminum rotor housings with iron/steel wear surfaces
Cylinder heads
Not applicable — rotary architecture
Valvetrain
Not applicable
Aspiration
Naturally aspirated
Fuel delivery
Carbureted

The 10A used a compact twin-rotor Wankel layout with aluminum rotor housings and no conventional pistons, cylinder heads, or valvetrain. Its small 982 cc nominal displacement produced unusually smooth high-rpm power for its size and let Mazda package the engine low and far back in the chassis.

Factory fitment

Notable applications

Mazda Cosmo SportMazda Familia Rotary / R100Mazda Savanna early models

Strengths

  • Very compact for its output
  • Smooth high-rpm operation
  • Historically important first-generation Mazda rotary

Watch-outs

  • Apex-seal and housing condition are critical
  • Specialist rebuilding knowledge required
  • Fuel economy and emissions lag piston engines

Common upgrades

  • Modern ignition
  • Carburetor tuning
  • Cooling and oil-metering improvements

Builder notes

Engineering notes worth knowing

01

Twin-rotor Wankel rotary with 982 cc nominal displacement.

02

Aluminum rotor housings with iron/steel wear surfaces.

03

Naturally aspirated and carbureted.

04

Output ranged from about 110 PS in early Cosmo Sport form to 128 PS in later L10B specification.

History & context

The story behind the engine

The 10A was the engine that made Mazda’s rotary gamble real. Instead of treating the Wankel as an experiment, Mazda put it into production and built the Cosmo Sport around it, proving the company could make a rotary road car work at scale.

Racing history

Mazda supplied a factory-spec 10A to a private Belgian team for the 1970 24 Hours of Le Mans, beginning Mazda's long Le Mans rotary program.

Legacy

The 10A launched Mazda’s rotary-engine lineage and established the compact, high-revving character that would define the brand’s rotary cars for decades.

Verification

Reference sources

Mazda Le Mans history — 10A debut

manufacturer history

Mazda Savanna history — 10A

manufacturer history

Mazda — Cosmo Sport 10A output and development history

manufacturer spec

TorqueList independent reference · Not an OEM publication or endorsement. Original TorqueList editorial and layout rights reserved.

02

TorqueList Technical Reference

Mazda Rotary

Full web profile

Mazda 12A Rotary

The 1.15-liter-equivalent twin-rotor that powered early RX-7s and became one of Mazda's defining performance engines.

Mazda 12A Rotary engine

Mazda 12A Rotary enginePhoto: U.S. National Archives and Records Administration — public domain — via Wikimedia Commons · source

★

Why it matters

Key takeaway

The 12A carried the rotary into high-volume sports-car production and gave the first-generation RX-7 its compact front-midship packaging.

Engineering

Technical specification

Architecture
Twin-rotor Wankel rotary
Block
Aluminum rotor housings with iron/steel wear surfaces
Cylinder heads
Not applicable — rotary architecture
Valvetrain
Not applicable
Aspiration
Naturally aspirated; turbocharged in selected later applications
Fuel delivery
Carbureted or electronic injection depending version

The 12A enlarged Mazda’s twin-rotor concept while retaining the same basic compact Wankel architecture. Its extra displacement improved torque without sacrificing the low engine height and smooth high-rpm operation that made the rotary ideal for sports-car packaging.

Factory fitment

Notable applications

Mazda RX-7 SA/FBMazda SavannaMazda CosmoMazda Luce/929 rotary applications

Strengths

  • Compact and light
  • Smooth high-rpm character
  • Huge historical RX-7 significance

Watch-outs

  • Apex-seal and housing wear
  • Carbureted versions require careful tuning
  • Thermal management is critical

Common upgrades

  • Street-porting
  • Improved cooling
  • Modern ignition and fuel control

Builder notes

Engineering notes worth knowing

01

Twin-rotor Wankel rotary with 1.146 L nominal displacement.

02

Naturally aspirated in most production applications; a turbocharged version followed in selected later cars.

03

Carbureted or electronically injected depending version.

04

First-generation RX-7 road output reached about 130 hp in Japanese launch history, while later 12A turbo versions reached 160 PS.

History & context

The story behind the engine

The 12A took Mazda’s rotary from novelty to mainstream sports-car success. In the first RX-7, its small size helped Mazda place the engine behind the front axle line and create the balanced handling that made the car famous.

Racing history

A 12A-powered RX-7 won the 1981 Spa 24 Hours overall, and Mazda used 12A-powered cars in its developing Le Mans program.

Legacy

The 12A became the defining engine of the first-generation RX-7 and helped turn Mazda into the world’s most committed rotary manufacturer.

Verification

Reference sources

Mazda history — first-generation RX-7 and 12A

manufacturer history

Mazda history — Spa 24 Hours victory and 12A turbo

manufacturer history

Mazda history — 1978 RX-7 12A 130 hp

manufacturer history

TorqueList independent reference · Not an OEM publication or endorsement. Original TorqueList editorial and layout rights reserved.

03

TorqueList Technical Reference

Mazda Rotary

Full web profile

Mazda 13B-REW

The sequential twin-turbo 13B that powered the FD RX-7 and became Mazda's most famous street rotary.

Mazda 13B-REW engine

Mazda 13B-REW enginePhoto: C0rbin99 — CC BY-SA 4.0 — via Wikimedia Commons · source · license

★

Why it matters

Key takeaway

The 13B-REW paired the compact rotary with sequential twin turbochargers, helping the FD RX-7 achieve world-class power-to-weight and balance.

Engineering

Technical specification

Architecture
Twin-rotor Wankel rotary
Block
Aluminum rotor housings with iron/steel wear surfaces
Cylinder heads
Not applicable — rotary architecture
Valvetrain
Not applicable
Aspiration
Sequential twin turbocharged and intercooled
Fuel delivery
Electronic fuel injection

The 13B-REW combined Mazda’s 1.3-liter twin-rotor layout with sequential twin turbochargers and intercooling. The compact rotary core kept the FD RX-7 light and low, while sequential boost control was engineered to deliver strong response across a wide rpm range.

Factory fitment

Notable applications

Mazda RX-7 FD3S

Strengths

  • Compact and light
  • Excellent boost response
  • Large global tuning aftermarket

Watch-outs

  • Heat management is critical
  • Sequential turbo control adds complexity
  • Apex-seal/rotor-housing condition strongly affects rebuild cost

Common upgrades

  • Single-turbo conversion
  • Fuel-system and ECU upgrade
  • Intercooler and cooling-system improvements

Builder notes

Engineering notes worth knowing

01

Twin-rotor Wankel rotary with 1.308 L nominal displacement.

02

Sequential twin turbocharged and intercooled.

03

Electronic fuel injection.

04

Factory output started at 255 PS and reached 280 PS in late manual-transmission FD RX-7 trims.

History & context

The story behind the engine

The FD RX-7 is remembered as one of Mazda’s purest performance cars, and the 13B-REW is the reason it could be so light, compact, and powerful at the same time. Sequential twin turbos gave the small rotary the response needed to compete with much larger engines.

Legacy

The 13B-REW became the most famous turbocharged production rotary engine and remains the performance benchmark for street-driven Mazda rotaries.

Verification

Reference sources

Mazda history — 1991 FD RX-7 13B twin turbo

manufacturer history

Mazda R26B history — 13B development lineage

manufacturer history

Mazda — 1998 RX-7 13B-REW trim-by-trim output

manufacturer spec

TorqueList independent reference · Not an OEM publication or endorsement. Original TorqueList editorial and layout rights reserved.

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All-manufacturer workshop tools

Mazda Workshop Companion

Builder utilities and edition 2.0 reference sections. Calculations use your entered measurements; empty or unverified interchange, machining, power and torque data are never represented as confirmed specifications.

Public preview: workshop reference content remains limited until this volume is unlocked. The compression calculator is a general educational utility.

Engine geometry & static compression

Starting values are examples only, not specifications for any engine. Use measured dimensions. Dish and valve relief add clearance volume; dome subtracts it. Deck means piston below deck at top dead center. Calculations are for one cylinder except total displacement.

Geometry
Compression inputs

Static compression

9.63:1

Displacement

349.8 ci

Displacement

5.733 L

Mean piston speed

3,480 ft/min

Rod-to-stroke ratio

1.638

Clearance volume

83.02 cc / cyl

Static compression = (swept + clearance) ÷ clearance. Mean piston speed = 2 × stroke (feet) × RPM. These calculations do not predict fuel octane, dynamic compression, safe RPM, engine strength, horsepower, or whether a combination will clear mechanically.

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Attribution record

Image & License Credits

Only photographs recorded as approved for commercial use appear in this edition. TorqueList does not claim ownership of third-party photographs; all fallback technical artwork is TorqueList-created original material.

Mazda 10A Rotary

TTTNIS — CC0 1.0 — via Wikimedia Commons

CC0 1.0

Source: https://commons.wikimedia.org/wiki/File:Mazda_10A_engine_cutaway.jpg

License: https://creativecommons.org/publicdomain/zero/1.0/

Mazda 12A Rotary

U.S. National Archives and Records Administration — public domain — via Wikimedia Commons

Public domain

Source: https://commons.wikimedia.org/wiki/File:DISASSEMBLED_MAZDA_ROTARY_ENGINE_-_NARA_-_17476379.jpg

Mazda 13B-REW

C0rbin99 — CC BY-SA 4.0 — via Wikimedia Commons

CC BY-SA 4.0

Source: https://commons.wikimedia.org/wiki/File:Mazda_13B-REW_rotary_engine.jpg

License: https://creativecommons.org/licenses/by-sa/4.0/

Layout adaptations of this photograph remain subject to the same indicated CC BY-SA license.

TorqueList is an independent automotive reference publication and is not affiliated with, sponsored by, endorsed by, or authorized by Mazda Motor Corporation or any other vehicle or engine manufacturer.