Koenigsegg Agera / One:1 Agera / R / S / RS

5.0-litre V8 with twin variable-geometry turbochargers. Output progression: standard Agera 960 hp; Agera R (with E85) 1,140 hp; Agera S 1,030 hp; Agera RS 1,160 hp standard. Seven-speed dual-clutch transmission. Koenigsegg's autoskin technology allows remote door and bonnet operation. The Agera RS achievement at Pahrump, Nevada in November 2017 — driven by Niklas Lilja, two-way average 277.87 mph (top measured 284.55 mph one-way) — set Guinness records for fastest production car (top speed), fastest 0-400-0 km/h (33.29 seconds), and highest speed achieved on a public road. The record stood until Bugatti's Chiron SS 300+ in 2019. Total Agera production roughly 25-30 cars depending on iteration; 25 Agera RS units; 7 One:1 cars; 3 Agera Final Edition cars (Thor and Väder cars + RS Naraya). Now firmly collectible — Final Edition examples and One:1 cars at the absolute apex.