Porsche 911 Speedster (991)
Why 4.3: Porsche took the GT3’s 4.0L NA engine, put it in an open-top 991 with a six-speed manual, made 1,948 examples to honour the founding year, and charged a premium that guaranteed the allocation system would operate in full force. The driving experience is as close to pure as the 991 got.
Layout
Natural habitat
Ride comfort
Sound
The GT3's 4.0-litre flat-six to 9,000 rpm with individual throttle bodies and no roof between it and your ears. It is capped only by the flat-six's hard mechanical edge rather than melody — the same thing that holds the 992 GT3 just off the exotics.
6-cylinder · naturally aspirated · 9,000 rpm redline · rated 9.1 / 10 for engine sound
Market value
Median asking price, good condition · €212k (2019) → €285k (2026), trending up · illustrative data
Child seats · ISOFIX
There aren't any — strict two-seater.
Same 991-platform front-passenger option as the 911 R and GT2 RS — ISOFIX bracket and airbag key switch — usable if the standard adjustable sport seats are kept over the optional buckets.
991-era Porsche child-seat documentation; NHTSA recall 19V-875 (991 GT-family CRS instructions) (owner-community sourced, not manufacturer documentation)
The long version
The Speedster exists because enough people at Porsche and in the enthusiast community believed there should be a final, definitive expression of the 991 generation before the next architecture arrived. The Heritage Design package added brown leather and tweed trim that either looks perfect or deeply wrong depending on your reference frame, and the six-speed manual with a naturally aspirated 4.0L behind the rear axle is the version of the 911 engine note that makes people religious. Values climbed well above the €230,000 base price in the allocation chaos and have settled at a level that reflects genuine enthusiasm rather than speculative excess — most owners are holding, and the few that sell do so at a premium to new.