The ultimate LaFerrari is here: the FXX K

Ferrari was known to be working on a much more potent version of the LaFerrari and it’s finally here. It’s called the FXX K and is set to debut soon at the Finali Mondiali event in Abu Dhabi.

Originally, the car was going to be called the LaFerrari XX, but now, the name was changed to pay tribute to the FXX K’s HY-KERS kinetic energy regeneration system. Combined with a serious 6.2L V12 engine, the FXX K churns out a whopping 1045hp and 664 lb-ft of torque. The power is split between the V12, which produces 855hp, while the electric motor produces around 190hp.

The V12 is completely reworked when compared to the normal LaFerrari. Changes include redesigned intake manifolds, mechanical valve tappets instead of hydraulic, and polished heads for smoother airflow.

The HY-KERS system also gets updated with a new control unit, which gives drivers the chance to select four different drive modes, which all, manage the suspension, steering, power, and transmission, according to the situation and settings.

There’s much more serious aero work too with active body panels to optimize aerodynamics. Ferrari claims a 50% improvement in downforce and 30% less drag thanks to the improvements. Downforce is rated at 1,120lbs at 124mph, which is more than double the standard LaFerrari’s rating of 507lbs. Can you say, grip?

Prices and production numbers haven’t been announced, but can you really expect them to be anything but mind boggling? Check out the press release after the jump.


Maranello, 3rd December 2014 – Ferrari’s new FXX K research and development programme receives its world premiere next weekend at the Yas Marina Circuit in Abu Dhabi. The laboratory-car is based on Maranello’s first hybrid model and will grace the world’s tracks from next year onwards. The K in its moniker is a reference to the “KERS” kinetic energy recovery system it adopts in maximising its track performance.  

Unfettered by homologation and racing regulations, the FXX K will never be used in competition. It was, in fact, developed to be completely uncompromising, incorporating technological innovations that will guarantee an unprecedented driving experience to the exclusive group of Client-Test Drivers with whom the Prancing Horse will roll out a test programme over the coming two years.

The car’s enormous potential is attested to by two significant figures:  a total power output of 1050 cv (860 cv delivered by its conventional V12 engine and 190 by its electric motor) and maximum torque in excess of 900 Nm.

The FXX K’s 6262 cc V12 features new camshafts and a modified valve train with mechanical rather than hydraulic tappets. The intake manifolds have been redesigned and given a special type of polishing treatment. The exhaust system has been modified as its silencers have been eliminated.

The HY-KERS system has been evolved specifically for pure performance with the result that the driver can control the function logics from the specific 4-setting Manettino on the centre console: Qualify, for maximum performance within a limited number of laps; Long Run to optimise performance consistency; Manual Boost for instant maximum torque delivery; and Fast Charge, for a fast recharge of the car’s battery. 

A focus on delivering maximum efficiency at every stage of every track lap has resulted in extensive but integrated work on the entire car body in terms of both active and passive aerodynamics.  

The front of the car is dominated by a twin-profile spoiler and a larger splitter, which is 30 mm lower, with a gap in its centre. This design is an application of the concepts developed to improve aero balance in the GT category of the WEC, which Ferrari has won for three consecutive years.  Two pairs of vertical elements, an endplate and, externally, a dive plane, together with vertical fins channel the air towards the car’s flanks, generating a longitudinal vortex that creates a localised depression. This in turn sucks the wake from the wheels to the outside of the aerodynamic underbody. Along with the side skirts that extend out from the sills, the vortex helps isolate the airflow from the underbody to boost its efficiency.

The solutions on the rear of the car are highly sophisticated, too. The tail section is now higher and the mobile spoiler extends further for a total increase in extension of 60mm when fully deployed. A vertical fin and a small wing each side of the tail act as guide vanes in the low drag configuration and boost the spoiler’s efficiency in the high downforce one. This system also creates considerable downforce at the rear of the car, allowing the use of an extreme diffusion volume for the rear diffuser which optimises air extraction from the underbody.  The section of the flat underbody just ahead of the rear wheels is also exploited to the full to generate downforce thanks to the reduced pressure in the wheel arch guaranteed by the direct connection to the rear of the car by a by-pass duct.

The result is a 50% improvement in downforce in the low drag configuration and a 30% improvement in the more aggressive downforce configuration, resulting in a figure of 540 kg at 200 km/h.

Vehicle dynamics are further improved by the adoption of Pirelli slicks complete with sensors that monitor longitudinal, lateral and radial acceleration, as well as temperature and pressure. This ensures an accurate analysis of the interaction between the tyre and track surface, providing even more vital data to enable the traction control system to guarantee maximum performance.

The intervention level of the E-Diff electronic differential, F1-Trac traction control, Racing SSC (Side Slip Angle Control) – now specially calibrated to suit the car’s slick tyres – and the high-performance ABS can be controlled using the five-position Manettino on the steering wheel.



KERS system

Total maximum power 1050 cv
Total maximum torque >900 Nm
V12 maximum power* 860 cv @ 9200 rpm
Maximum revs 9250 rpm
V12 maximum torque 750 Nm @ 6500 rpm
Electric motor output 140 Kw (190 cv)


Type 65-deg. V12
Bore and stroke 94 x 75.2 mm
Total displacement 6262 cc
Specific power 137 cv/l


Length 4896 mm
Width 2051 mm
Height 1116 mm
Wheelbase 2650 mm


7-speed DCT


Front double wishbones
Rear multi-link

Tyres (Pirelli P-Zero slicks with sensors)

Front 285/650 – R19 x10.5
Rear 345/725 – R20x13

Carbon ceramic brakes (Brembo)

Front 398 x 223 x 36 mm
Rear 380 x 253 x 34 mm

Electronic controls

ESC stability control
High perf ABS/EBD Performance anti-lock system/electronic brake balance
EF1-Trac F1 electronic traction control integrated with the hybrid system
E-Diff 3 third generation electronic differential
SCM-E Frs magnetorheological damping with twin solenoids (Al-Ni tube)
Aerodynamics active

* with dynamic ram effect

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Chris Chin

Chris Chin is the Editor-In-Chief of egmCarTech and is a regular contributor to Automobile Magazine.

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