Meet the 400HP SLEEPER Peugeot 309 GTI

This isn’t your average retro Peugeot… what started as a classic 1989 309 GTI has been transformed into one of the most savage old-school hot hatches we’ve ever featured. Under the bonnet is a 2.0 16-valve XU10 turbo engine from a Peugeot 406 Sri Turbo with forged internals, paired with a Mi16 head from a 405 Mi16, standalone ECU and a T34 turbocharger — producing over 400BHP while weighing just 875kg 🤯 Owner - ​⁠‪@davebgsi‬ In this video, we meet the owner behind the build, break down exactly how this insane setup came together, dive into the engineering and fabrication work, and finally take it out on the road to see how it performs in the real world 💨 📌 What’s Inside: 0:00 – Intro 0:30 – The 309 GTI story 2:00 – Opening the bonnet 2:10 – Engine setup (XU10 block & Mi16 head turbo build) 2:50 – Power figures & performance breakdown 4:00 – Why that engine set up? 4:50 – Road test: what 400BHP feels like in 875kg 11:20 – Final thoughts 🚗 Related Builds & Content: Classic Peugeot GTI builds & turbo swaps XU10 turbo projects & Mi16 head builds The most insane retro hot hatches we’ve ever featured 💬 What do you think — is this the most underrated hot hatch of its time? Drop your thoughts in the comments below! If you love turbo builds, engine swaps, and raw old-school performance, make sure to subscribe and turn on notifications — we’ve got even more insane cars coming soon. #Peugeot309 #GTI #Engineswap #Turbo #ModifiedCars #RetroHotHatch #FrenchCar #Boosted #CarFeature #CarCulture Join this channel to get access to perks:    / @twinenginecorsa