For four heady years of competition between up to four manufacturers, the World Endurance Championship lived the true spirit of technical innovation within the quest for fuel efficiency, more so even than contemporary Formula One. For the last three of those four years - 2015 through 2017 - Porsche - after a learning year returning to Prototype racing in 2014 - won Le Mans and the Manufacturers’ title in the World Endurance Championship each season. 

Porsche’s 900 bhp power unit for its 2014-2017 919 LM P1 car demonstrated what is possible when the quest is to maximise performance from a given amount of fuel within the context of a hybridised power unit and without the shackles current rules impose upon the Formula One power plant. This is a World title winning hybrid powertrain that is not a refinement within a template imposed by rule makers but one optimally designed as fit for purpose.

RET 124 presents in depth the story of this remarkable power unit that went on allow a ‘formula libre’ version of the Porsche 919 to set new lap time benchmarks at Spa Francorchamps and the Nurburgring Nordschleife in 2018. It is an unrivalled investigation into the state of the art in fuel flow limited racing. Don’t miss what will be one of the most exclusive and talked about issues of RET of recent times!

Other highlights in this issue include a look at the challenge of GTE racing, focuses on vibration analysis and friction reduction.  We report back from PRI 2019 and have the latest edition of our E-Race Power Expo feature.

Highlights in this issue include a conversation with DS Techeetah's team principal and the challenge of Aquabike. A dossier on the M-sport Ford Fiesta R5 I4 Turbo as well as an insight into Toyota Racing Development USA. The results of Race Engine of the Year 2019, reports from Testing Expo North America and PMWE 2019 as well as focus articles covering computer aided manufacturing (CAM), turbo's and superchargers.

Highlights in this issue include a conversation with HPD’s Mark Crawford as well as an update on the Yamaha MotoGP I4. A dossier on the Bolt HRC-4 I4 Turbo, the challenge of Moto3 with KTM and we look at Hybrids in the WRC. Focus articles on component lifting, valves and piston rings, we also detail the Race Engine of the Year 2019 Nominations. E-Race Power Technology contains a conversation with Mercedes-Benz’s Ian James as well as looking at the Lightning Motorcycles LS-218.

Highlights in this issue include a conversation with Renault F1's technical director Remi Taffin and the challenge of F1H20 World Championship. A report from the British Grand Prix 2019 and Engine Expo 2019, as well as a dossier on the Outkast Racing Engines RY45 Late Model v8. We investigate the Team Bath Formula Student KTM Turbo, the EDL Judd DB and the Suzuki NHRA Pro Stock motorcycle. As well as a focus article covering transmissions.

Highlights in this issue include a conversation with Norio Aoki from Toyota Gazoo Racing and a report on 24-Hour Prototype Engines 2019. A dossier on the Mercury Racing 2.5 EFI F-1 H20 v6 and we look into ECR Engines Cadillac DPi-V.R. A report from the European Automotive Testing Expo 2019 as well as focus articles covering lubricants, component and materials testing. 

Highlights in this issue include a conversation with Aprilia's Romano Albesiano, Electric Avenue & Challenge Of The British Hill Climb Championship. A dossier on the Noonan NHRA Pro Mod 4.9 Hemi, we also look at the 4Piston Super 99 as well as focus articles covering transient dynamometers & exhausts. 

Highlights in this issue include a dossier on the Prodrive World RX I4 Turbo, Race Engine Retro and the challenge of Formula E. Insights into valve seats and Jesel's Equal Eight as well as focus articles covering CAD, sensors and data acquisition. 

Highlights in this issue include a conversation with Tankpool 24 Racing's Stefan Honens, a dossier on the Jon Kaase Extreme Pro Stock V8 and challenge of Dakar Malle Moto. A report from Autosport Engineering 2019, special investigations into Time Attack and the Elmer Racing Thor I4 Turbo. An insight into Electromagnetic design tools as well as focus articles covering fuel filters.

Highlights in this issue include a conversation with Energica's CTO Giampiero Testoni, an insight into high-performance computing as well as electric avenue. A dossier on Yamaha's YZR-M1 I4, the challenge of Top Fuel Hydroplane and a show report from PRI 2018. We take a look at the Gyrtech Dakar Caterpillar I6 Turbodiesel as well as a focus on crankshafts.

Highlights in this issue include a conversation with ExternPro’s technical director Trevor Morris and a dossier on the Porsche RSR17 GTE FLAT-SIX. The Challenge of MotoGP and Race Engine of the Year 2018. A report from PMWE 2018, insight into combustion analysis, Race Engine Retro as well as a focus on camshafts. 

Highlights in this issue include a conversation with Sebastian Risse and a dossier on Dougan's Racing Engines Trophy Truck V8. The next instalment of Jack Kanes Reno v12 Turbo, the challenge of FIA Truck Racing and we reveal the 12 nominations for the Race Engine of the Year 2018. An insight into Rallycross as well as focus articles covering bearings and coatings. 

Highlights in this issue include a conversation with Motohiro Matsumura of Nismo, a dossier on the Mecachrome V634P1 LM P1-NH and a report from the 2018 British GP. The fifth part of Jack Kane's Project Reno V12 Turbo and the challenge of Electric Motorcycle Racing. We look at the Liquid-Piston X-Mini as well as focus articles covering fuels, pushrods and rockers.