Alpina has brought two world debuts to showcase at the 2013 Geneva auto show - the B3 F30 and the Alpina XD3 (based off the X3 SAV).

You can find the B3 F30’s full official specs and gallery inside.

Here are some new photos and updated specs of the Alpina F30 B3 Bi-Turbo.

The F30 B3 boasts more power and torque than the E90 B3, yet is 20% more gas efficient.

The new B3 Bi-Turbo delivers 410 HP (301 kW) starting at 5500 RPM (compared to the US F30 335i with 300 HP), and and 442 lb-ft (600Nm) torque. Transmission comes in the form of a ZF 8 speed automatic.

0-100kmh (0-62 mph) takes only 4.2 seconds.

Top speed is 305 km/h (189 MPH).

Emissions decreases by 7.6 L per 100 km, to 177 g / km CO2.

Alpina has revealed the specs and first full photo of its new B3, based on the F30 335i sedan.

The F30 B3 boasts more power and torque than the E90 B3, yet is more gas efficient.

The new B3 Bi-Turbo delivers 403 HP (301 kW) at 5500 RPM, paired with the ZF 8 speed automatic.

0-100kmh (0-62 mph) takes only 4 seconds.

Full specs (and photos) of the car will be revealed when it debuts at the 2013 Geneva Motor Show early next month.

The Alpina F30 B3 has started development and we’ve got the first sighting of the prototype. The B3 test mule (based on the F30 335i) provides a good preview of the external styling to expect on the F30 B3, with its Alpina front lip spoiler, aggressive trunk spoiler, quad exhaust, and of course Alpina wheels. It appears that Alpina has now changed the front lip spoiler design from its original preview render. The production version is likely to feature a special exterior color as in past Alpina models.

The F30 B3 will be powered by a highly massaged (by Alpina) N55 engine which should output more than the 400HP from the current B3 S’s N54 engine. It will be offered in automatic transmission only. Expect a top … CONTINUED

Alpina has released a preview render of the F30 Alpina B3. Expect it to debut at next year’s Geneva show in March 2013 and to be powered by same N55 engine which powers the current B3 S, but massaged by Alpina to an even higher output than the current B3 S which has 400HP.