Jaguar Land Rover’s factory-owned SVO division is its version of a high-end drug laboratory.

But instead of concocting nefarious chemicals for the Rio-bound crowd, this factory peddles performance-enhancing products of another kind. Run by John Edwards, SVO (which stands for Special Vehicles Operations) pumps out special one-offs and line-toppers like the Range Rover Sport SVR from its off-site skunkworks in Wolverhampton.

The latest effort of the in-house power-brokers is the stronger, sharper F-Type SVR. Available as a coupe or convertible, the SVR is louder, faster and more expensive than the regular 404kW R-version.

Jaguar F-Type SVR rear

Along with the exotic exhaust material and aluminium-rich suspension, the lightweight wheels ensure every SVR will shed at least 25kg. But owners can go further and option carbon-ceramic brakes and a carbon-fibre roof to take that total to 50kg.

All-wheel drive’s enlisted to tame the car’s new stonk and a huge tail spoiler announces its unique bodykit. The rear wing will automatically pop up at 113km/h, stow at 80km/h, and is programmed to work with an automatically adjusting front spoiler. Meanwhile, a smooth underfloor and rear diffuser round out efforts to cut lift and boost downforce.

Jaguar F-Type SVR engine

At $289,590 for the SVR coupe, or $308,470 for the convertible, the SVR costs a whopping $47,220 more than a regular F-Type R AWD hardtop. Or $10K less than the recent XKR-S coupe. Is it worth it? Well, that depends.

The 423kW range-topper cuts a claimed 0.4sec off the R’s 0-100km/h acceleration time (now 3.7sec), its top speed increases from 300 to 322km/h and peak torque spreads over a wider plateau stretching from 3500 to 5000rpm.

Jaguar F-Type SVR front driving

Still, the car is beautifully put together and offers plenty of options to personalise colour and trim. Those who visit the Jaguar dealer with enough cash can spend big on the lightweight roof and brakes, and a full carbon-fibre trim package.

To drive it we’re thankful to be dragged two-hours from Barcelona to Motorland Aragon, because out here rests a 5.34km circuit and the appropriate space to see if all-wheel drive and torque vectoring have taught this big-fanged kitty some manners. After all, the early F-Type V8 S was a car that challenged both the competent and fearless even in the dry.

Jaguar F-Type SVR interior

Pushed hard, the angry F-Type displays notably less understeer at both high and low speeds, and with the grip of all-wheel drive, you can use throttle without fear of turning the rear tyres into ghosts too easily.

The colossal supercharged 5.0-litre V8 is explosively responsive; it punches hard with an addictive supercharger whine. Meanwhile, the dual-stage exhaust is noisy enough to strip foliage off nearby trees above 3000rpm.

Jaguar F-Type SVR rear driving

It’s obvious the eight-speed auto also shifts faster, DSC and Dynamic mode change the handling attitude more keenly and the directional stability has been greatly improved.

Downsides? The dual-mode dampers can be too compliant or overly stiff. There are a lot of vertical body movements, the front-end dislikes transverse imperfections and the rear-axle can’t absorb bumpy surfaces under load. Those that find its looks too ‘aggressive’ can delete the rear wing, but without it the maximum speed drops to a paltry 300km/h and street cred suffers accordingly. Oh, and there’s still a distinct lack of luggage space inside.

Jaguar F-Type SVR side

This car is all about theory versus practice, and it doesn’t come cheap. Rational thinking requires considering an F-Type S coupe, with a 280kW V6, costs almost half as much bob as the SVR coupe, but certainly isn’t 50 per cent less desirable.

In a perfect world, we’d like to see a lighter, no-frills edition aimed at performance-oriented purists who must currently queue for a 911 GT3. But if you prefer ticking all boxes and money’s no real object, then what the heck – it’s a wild ride.

4.5 OUT OF 5 STARS

LIKE: Bone-shakingly fast DISLIKE: Unpractical; price; moody dual-mode dampers

SPECS Engine: 5000cc V8, DOHC, 24v, s/c Power: 423kW @ 6500rpm Torque: 700Nm @ 3500rpm Weight: 1705kg 0-100km/h: 3.7sec Price: $289,590