Porsche 911 GT3 Touring (992) versus Porsche 911 Coupe (992.1 Series) GT3. 21 points of retained value between them — ~£268 per horsepower plays ~£268 on today’s market.
The GT3 Touring is the better buy. Both cars carry the same 503bhp naturally aspirated flat-six and the same fundamental chassis, so the performance gap is tighter than the 0-62 split suggests — the Touring's 3.9 seconds reflects its lighter 1418kg kerb weight and standard PDK pairing, and its 355bhp-per-tonne edges the standard GT3's 330. The Touring cost £31,880 less new, and at £254 per horsepower versus £317, it bought the same engine for considerably less money from the showroom floor. On today's used market the numbers get sharper. Current auction data puts both cars at roughly £268 per horsepower — meaning the Touring's new-buyer discount has largely evaporated, but so has its depreciation risk. That 106% retention figure should be treated carefully: it's derived from just two model-wide sales with no Touring-specific auction data behind it, so we wouldn't bet a purchase decision on the precise number. What it does suggest is that the market values the Touring at least as highly as it valued it new, and arguably more. The standard GT3 shows signs of having softened slightly from its original premium, though the same data caveat applies. The character argument lands the same way. If your GT3 sees more road miles than track days — which most privately owned examples do — the Touring's cleaner roofline, manual-option availability, and marginally more civilised temperament cost you nothing in driving purity. You're not buying a compromise. You're buying the same weapon with better camouflage and stronger residuals.