Porsche 918 Spyder
Why 3.5: The hybrid-trinity member most likely to actually get driven — Porsche people occasionally being Porsche people — but seven-figure values still win most days. Doug's 72 measures the machine; our 5.8 measures the garage.
Layout
Natural habitat
Ride comfort
Sound
A 4.6 V8 derived from the RS Spyder racer, revving past 9,000 into exhausts that exit on top of the engine, a metre behind your head. But it is a hybrid that spends real time running silently, and the race V8 is hard and hollow rather than rich. Extraordinary when it fires.
8-cylinder · naturally aspirated · 9,000 rpm redline · rated 9.1 / 10 for engine sound
Market value
Median asking price, good condition · €777k (2015) → €1.7M (2026), trending up · illustrative data
Child seats · ISOFIX
There aren't any — strict two-seater.
No child-seat option turns up anywhere. Like the Carrera GT, the 918's seats are fixed lightweight carbon-shell buckets — structural and non-adjustable, and on Porsche's own excluded list for child restraints.
918 Spyder fixed carbon bucket seat documentation (Porsche parts listings); Porsche bucket-seat child-restraint restriction (owner-community sourced, not manufacturer documentation)
The long version
Buyers here tend to already own a 911 GT3 or two, which explains why the 918 gets more track-day mileage than its million-dollar hybrid siblings — it is the one member of the trinity whose owners have somewhere else to put their daily flexing. The plug-in system was mocked at launch as a compliance gesture; it has since become the reason a handful of owners actually lap the thing on electric torque before the V8 wakes up. Most still live under a cover between Porsche club weekends, appreciation doing the work insurance premiums used to discourage.