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  In 1997 Radical launched its first sports Racer, the 1100 Clubsport; it was an instant hit.  It had dramatic styling, high-reving engine, sequential gearbox, high standards of safety, good value and immense fun to drive.  A lot has happened since those early successes and today Radical keeps pushing the envelope as evidenced by their newest creation the incredible SR8.  Oh as you might have guessed, things won't stop there.  They continue to push the envelope with future developments but before we get ahead of ourselves, lets show you what you can enjoy today!




SR4
Brochure



SR4 Clubsport

The SR4 is a compact lightweight two-seat sports racer and trackday car.  The extreme Radical styling of the SR4 was inspired by the Le Mans winning Bentley and Audi.  The SR4 can be fitted with engine options ranging from a Powertec Kawasaki 1200cc 190bhp model to a Powertec Suzuki 1500cc 252bhp model.  With room for two 6' adults, the SR4 was awarded EVO magazine's "Trackday Car of the Year 2004" and Autocar magazine enthused: "Trackcars don't come any faster, better or more exciting than this."



SR3
Brochure



SR3

SR3 Supersport

The SR3 is some 5" wider than the SR4, weighs 1124lbs and is the ultimate endurance racing and trackday car.  It can be ordered with a choice of Powertec engines ranging from 205bhp to a screaming 330bhp.  The full-race SR3 has proven to be the worlds fastest one-make sports racing car,  lapping circuits at near Formula 3 times and smashing the Nuburgring Nordschleife lap record.  A host of design and technical innovations are incorporated into the SR3, both in performance and safety!



SR8
Brochure



Radical SR8

The SR8's chassis is based on that of the award winning SR3 Turbo and is powered by the all-new Powertec  380bhp RPA V8.  Power is delivered to the rear wheels via a Powertec Quaife six-speed sequential transaxle.  All new bodywork incorporates an ultra high downforce aerodynamic package and more aggressive styling.  The SR8 has set even higher standards of performance combined with new levels of safety.



Standard Optional Not Available

Engine
SR4
 SR3
SR8
Powertec Kawasaki 1200 - 190bhp, flat-slide carbs, ram air box    
Powertec Suzuki 1300 - 205bhp, flat-slide carbs, ram air box
 
Powertec Suzuki 1300 - 230bhp, flat-slide carbs, ram air box
   
Powertec Suzuki 1500HC - 252bhp, flat-slide carbs, ram air box
 
Powertec RPA V8 380bhp, integral dry sump, 8 injector/twin butterfly    
Dry sump system
Fuel injection system (for 1300cc & 1500cc motors)
 
Transmission
SR4
SR3
SR8
Six-speed sequential gearbox
Powertec chain drive system (integral torque-bias LSD and reverse
   
Powertec gear drive system (integral torque-bias LSD, reverse gear and interchangeable gearing)
Gear drive oil cooler with integral pump
Chassis
SR4
SR3
SR8
Powder-coated steel spaceframe construction with integral FIA-approved safety cage and powder-coated stressed aluminum panels.
Side impact pods
Front crash box
44, 54 liter aluminum foam-filled fuel tank
Fuel cell
Dry-break re-fuelling system
Air jacks
Forward-facing roll bar stays
Left-hand drive conversion
Suspension
SR4
SR3
SR8
Front & rear patented 'Nik' suspension system. Double wishbone with fully floating, single adjustable coil-over dampers, and 'Nik' anti-roll system
Single-adjustable bespoke mono-tube titanium shock absorbers
Trip-adjustable bespoke mono-tube titanium shock absorbers
Bodywork
SR4
SR3
SR8
Removable lightweight self-colored glass-fibre nose and engine cover with integral cooling grilles and flush-mounted release clips
Fixed side pods, cockpit surround
Carbon fibre wind deflector
High downforce front splitter & side skirts
Full width racing rear wing
Front & rear wheel arch louvers
Twin driving mirrors
Carbon/kevlar front venturi & brake cooling ducts
Carbon/kevlar rear undertray & venturi
Twin headlights & triple rear lights
Headlight covers (unless headlights specified)
Cockpit
SR4
SR3
SR8
Adjustable molded driver/passenger seat
Driver six-point race harness
Passenger six-point race harness
Adjustable pedal box
Quick-release steering wheel
Mechanically-operated fire extinguisher
Electrically-operated fire extinguisher
Remote electrical isolation switch
Sequential gear lever (gear change direction adjustable)
Reverse gear engagement lever
Instrumentation
SR4
SR3
SR8
Wrap-around carbon-fibre dashboard
Radical instrument panel - incorporating super-bright LED rev counter, shift lights, high-intensity LCD display of engine parameters and speed, plus warning lights & maximum engine revs recall button
Steering wheel-mounted dashboard
Lap timer & data logger
Dashboard-mounted brake bias adjuster
Wheels & Tires
SR4
SR3
SR8
Cast alloy 4 bolt 13" x 7" Front - 13" x 9" Rear
Cast alloy center-lock 13"x 7" Front 13" x 8"" Rear
Ultra-lightweight billet-center, three-piece, center-lock  13"x8" front & 13"x10" rear
Cast alloy center-lock 15" x 7" Front - 16" x 8" Rear
Light-weight three-piece, center-lock 15" x 7.5" F & 16" x 9.5" R
Light-weight three-piece, center-lock 15" x 8.5" F & 16" x109.5" R    
Radical-spec. slicks
Brakes
SR4
SR3
SR8
Four-pot calipers front & rear, 260mm diameter vented discs front
Four-pot calipers front & rear, 260mm diameter vented discs F & R  
Floating disc brake upgrade
SVA Kit
SR4
SR3
SR8
Road-legal lighting, fuel injection, hand brake system, horn, silencer with catalytic converter, mirrors, reflectors and bodywork trim.
Dimensions
SR4
SR3
SR8
Width
1.63m
(5'3")
1.8m (5'11")

1.8m

(5'9")

Length (with wing)
3073m
(12.2')
4.05m (13.3')

4.05

(13.3')

Ground clearance
50mm
(2")
50mm
(2")

50mm

(2")

Minimum dry weight
470Kg
(1036lbs)
510Kg
(1124lbs)

590Kg

(1300lbs)