Ford Focus ST Supplement Manual page 9

Focus ST Unique Features
Engine Information
Item
Configuration
Bore x Stroke
Displacement
Compression ratio
Horsepower
Torque
Redline
Specific output
Valvetrain
Ignition
Fuel system
Throttle body
Pistons
Crankshaft
Connecting rods
Turbo
Exhaust system
* SAE Certified Performance ratings are achieved with 19.5 psi, but up
to 21 psi can be delivered to maximize power depending on fuel quality
and atmospheric conditions.
8
2013 Focus ST (stf)
Supplement, 1st Printing
USA (fus)
Description
Transverse mounted I4, cast
aluminum cylinder block and
cylinder heads
87.5 mm bore x 83.1 mm stroke
(3.44 in. x 3.27 in.)
1999 cubic centimeters
(122 cubic inches)
9.3:1
252 hp @ 5500 rpm on 93 octane
243 hp @ 5500 rpm on 87 octane
270 lb-ft @ 2500 rpm on 93 octane
270 lb-ft @ 2500 rpm on 87 octane
6500 rpm continuous
6800 rpm 3 second over-rev
126 hp/liter
Twin independent variable cam
timing
Coil-on-plug
150 bar fuel pump
57 mm (2.2 in.)
Cast aluminum
Cast iron
Forged steel
Single scroll / 21 psi max boost*
63 mm (2.5 in.) diameter