{{Infobox car | name = Radical SR4 | image = Autosport International The Racing Car Show NEC Birmingham 2011 DSC 3458 (5377786222).jpg | manufacturer = Radical Sportscars | production = 2004-2016<br>46 produced | assembly = Peterborough, England | designer = Mike Pilbeam | class = Sports Car | body_style = Roadster | layout = Longitudinally mounted Mid Engine, RWD | engine = See below | transmission = 6-speed Sequential and Manual | length = {{convert|3760|mm}} | width = {{convert|1630|mm}} | height = {{convert|1000|mm}} | wheelbase = {{convert|2370|mm}} | sp = uk | predecessor = Radical Clubsport | related = Radical SR3 }}
The '''Radical SR4''' is the sixth car produced by Radical.
== History == The SR4 was originally intended as a smaller sibling to the SR3, however the car was significantly less popular then that of the SR3, with only 46 of the SR4 being made until the production was halted in 2016.<ref name=":0">{{Cite web |title=Radical SR4 Registry |url=https://radicalsportscarregistry.com/sr4-registry/ |access-date=2025-01-20 |website=Radical Sportscar Registry |language=en-US}}</ref><ref>{{Cite news |date=2018-07-14 |title=This 2005 Radical SR4 Should Quench Your Thirst For Speed {{!}} Carscoops |url=https://www.carscoops.com/2018/07/2005-radical-sr4-quench-thirst-speed/ |archive-url=https://web.archive.org/web/20190706031158/https://www.carscoops.com/2018/07/2005-radical-sr4-quench-thirst-speed/ |archive-date=2019-07-06 |access-date=2025-01-20 |work=Carscoops |language=en-US |url-status=live }}</ref>
== Specifications == The SR4 would have largely similar motors to its larger siblings, with one notable exception; the {{Convert|998|cc|cuin L|abbr=on}} Honda CBR1000RR motor, which was one of the unique options to the SR4, with only 7 being produced with this engine, and only 2 retaining this engine as of December 2024.<ref>{{Cite web |date=2024-10-28 |title=Radical SR4 Clubsport |url=https://racecarsdirect.com/Advert/Details/149844/radical-sr4-clubsport |access-date=2025-01-20 |website=racecarsdirect.com |language=en}}</ref> The other unique engine option was that of the {{Convert|1164|cc|cuin L|abbr=on}} Kawasaki ZZ-R1200, which was the first engine fitted to the car, but no car built with this engine is still fitted with it as of December of 2024.<ref name=":0" /> The 1200 will do 0-{{Convert|100|km/h|mph|abbr=on}} in 3.7s, the quarter mile in 12.4s and has a top speed of {{Convert|234|km/h|mph|abbr=on}}.<ref name=":1" />
== Engines == {| class="wikitable sortable" |+ !Name !Displacement !Engine !Horsepower !Torque !Weight |- |SR4 1000 |{{Convert|998|cc|cuin L|abbr=on}} |I4 (Honda CBR1000RR) |{{Convert|172|bhp|PS kW|abbr=on}} @ 11,000 rpm |{{Convert|104|N.m|lb.ft|abbr=on}} @ 8,500 |{{Convert|530|kg|lb|abbr=on}} |- |SR4 1200<ref name=":1">{{Cite web |title=Radical SR4 1.2 specs, quarter mile, lap times, performance data |url=https://fastestlaps.com/models/radical-sr4-1-2 |access-date=2025-01-20 |website=FastestLaps.com |language=en-US}}</ref> |{{Convert|1164|cc|cuin L|abbr=on}} |I4 (Kawasaki ZZ-R1200) |{{Convert|186|bhp|PS kW|abbr=on}} @ 9,800 rpm |{{Convert|125|N.m|lb.ft|abbr=on}} @ 6,500 |{{Convert|530|kg|lb|abbr=on}} |- |SR4 1300 SR4 CS<ref>{{Cite web |last=Garlitos |first=Kirby |date=2011-01-03 |title=2005 Radical SR4 CS |url=https://www.topspeed.com/cars/radical-sportscars/2005-radical-sr4-cs/ |access-date=2025-01-20 |website=TopSpeed |language=en}}</ref> |{{Convert|1300|cc|cuin L|abbr=on}} |I4 (Powertech-Suzuki Turbocharged) |{{Convert|250|PS|bhp kW|abbr=on}} |{{Convert|175|N.m|lb.ft|abbr=on}} |{{Convert|500|kg|lb|abbr=on}} |- |SR4 1340 |{{Convert|1340|cc|cuin L|abbr=on}} |I4 (Suzuki Hayabusa) |{{Convert|202|bhp|PS kW|abbr=on}} |{{Convert|169|N.m|lb.ft|abbr=on}} |{{Convert|430|kg|lb|abbr=on}} |- |SR4 1500 |{{Convert|1489|cc|cuin L|abbr=on}} |I4 (Powertech-Suzuki) |{{Convert|252|bhp|PS kW|abbr=on}} |{{Convert|176|N.m|lb.ft|abbr=on}} |{{Convert|445|kg|lb|abbr=on}} |- |SR4 1585 |{{Convert|1567|cc|cuin L|abbr=on}} |I4 (Powertech-Suzuki) |{{Convert|333|bhp|PS kW|abbr=on}} |{{Convert|300|N.m|lb.ft|abbr=on}} |{{Convert|500|kg|lb|abbr=on}} |}
==References== {{reflist}}
SR4 Category:Rear mid-engine, rear-wheel-drive vehicles Category:Cars of England Category:Sports cars Category:Cars introduced in 2004 Category:Cars discontinued in 2016 Category:2000s cars Category:2010s cars