Porsche 718 GT4 RS
Why 5.8: The GT3's 9,000 rpm engine breathing behind your ear in a smaller car. Flip premiums faded fast, and the cars that remain actually get tracked.
Layout
Natural habitat
Ride comfort
Sound
Porsche put process air intakes where the rear quarter windows were, so the GT3 flat-six howls beside your head — intake noise, not exhaust, all the way to 9,000 rpm. Narrower in range than a V10 or V12, which is the only thing holding it off the top.
6-cylinder · naturally aspirated · 9,000 rpm redline · rated 9.3 / 10 for engine sound
Market value
Median asking price, good condition · €152k (2022) → €193k (2026), trending up · illustrative data
Child seats · ISOFIX
There aren't any — strict two-seater.
The same ISOFIX-plus-airbag-key-switch option applies, but the GT4 RS's standard-fit lightweight bucket seats are excluded from child-seat use by Porsche's own rule — you'd need the adaptive sport seats instead.
Porsche 718 Cayman GT4 RS configurator seat options + Porsche child-seat/bucket-seat restriction
The long version
Launch year turned the GT4 RS into an allocation flip, six-figure markups changing hands before delivery mileage hit triple digits. That premium has been bleeding off every year since, and as the speculators cash out, the cars left in the pool skew toward people who actually book track days instead of storage units. It wears Screamer for the shared GT3 engine and Track Rat because that is genuinely where these get used once the flippers move on to the next allocation game. Involvement is about as high as the index goes; used-market churn is the only thing holding the score back.