New Jaguar supercharged V-6 named for Jaguar F-Type, Jaguar I-4 also announced

Jaguar supercharged 3.0-liter V-6 engine to be used in Jaguar F-Type

Jaguar supercharged 3.0-liter V-6 engine to be used in Jaguar F-Type (click on photo to enlarge)

Now we know what will power the Jaguar F-Type. The new smaller sports car from Jaguar—the first two-seater since the demise of the E-type—will be powered by a 380-horsepwer supercharged 3.0-liter V-6 that “draws on key technology used in the Jaguar 5-liter V8” will be used exclusively in the Jaguar F-Type. Along with the new V-6, Jaguar used the Beijing auto show to announce a supercharged 2.0-liter four-cylinder engine would be “introduced” to the Jaguar range.

The four-cylinder engine isn’t new, already used in the Range Rover Evoque recently arrived at dealer showrooms, but it’s the first time ever for a four to power a Jaguar since the Austin 7 Swallow of the ‘30s—and that really wasn’t a Jaguar but a rebodied British economy car, the Austin 7. Jaguar did not say which model would use the 240-horse two-liter but based on the Jaguar lineup, it’s improbable that the engine would be used anywhere but the F-Type.

Jaguar turbocharged 2.0-liter I-4

Jaguar turbocharged 2.0-liter I-4 (click on photo to enlarge)

The Jaguar supercharged V6 will use the V8’s 90 degrees between the vee, but the displacement of the six means that the engine will have smaller per-cylinder displacement requiring a reduction in bore, stroke or perhaps both. The new V6 will, however, have direct injection, variable valve timing and aluminum construction. Jaguar claims the supercharged V-6 “will offer comparable levels of power and refinement to the naturally-aspirated version of the V8 engine, but with greater specific output and efficiency courtesy of supercharging.”

Like the Jaguar V8, the new V6 will have a lightweight die-cast block with cross-bolted main bearing caps for added rigidity. Dual independent variable cam timing (DIVCT) system is activated by positive and negative torques generated by the movement of the intake and exhaust valves, and is able to change valve timing by than 150 degrees per second throughout the rev range. The compression ratio of the supercharged V6 has been raised compared to that of the supercharged V8, at 10.5:1 compared to 9.5:1 for the latter.

A Roots-type twin vortex supercharger is positioned between the banks of the Jaguar engine’s vee, and the intake system includes a water-cooled intercooler. To compensate for the natural imbalance of a 90-degree V-6, the engine uses a system of counter-rotating front and rear balancer weights.

The supercharged V-6 uses a twin solenoid starter in an auto stop-start system that restarts the engine when the driver’s foot is lifted from the brake pedal. Jaguar says that in its system, in engine stop-start ‘change of mind’ scenarios the cylinders can be recharged by rapidly reintroducing fuel into the cylinders.

Jaguar F-type in camo

The Jaguar F-Type in camoflage to conceal its shape (click on photo to enlage)

The supercharged V-6 Jaguar engine will be available in two states of tune, with either 340 or 380 horsepower, and although Jaguar hasn’t specified the details that create the differences in output, the latter will only be used in the Jaguar F-type sports car. There’s no word where the lower output engine might be used other than the F-Type.

Both four and six cylinder engines will be equipped with a lightweight ZF eight-speed automatic transmission with tuning specific to these applications.

The Jaguar F-Type, based on the Jaguar C-X16 concept revealed at the Frankfurt motor show in September, 2011, will be launched as a convertible in mid-2013. More details will follow during 2012, but at least we now know what will be under the hood, or at least the bonnet.