New Ford Fiesta ST gains optional LSD

James Marshall
March 13, 2018

The engine, though downsized to a 1.5 liter Ecoboost three-pot, produces 197-horsepower, an output equal to that of the outgoing car's 1.6 on overboost mode. Scheduled to go on sale in the Old Continent this spring, pricing for the FiST will be released in the coming weeks for both the three- and five-door models.

The hot Fiesta will also become available with an optional mechanical Quaife limited-slip differential for better traction, as well as a Launch Control system that's supported by a dedicated graphic display on the instrument cluster.

The auto does the rest, dialling in the optimum amount of torque, traction/stability control and torque vectoring to maximise traction and acceleration to smash out consistently fast launches.

The steering rack is bespoke to the new Fiesta ST, with Ford claiming that it's the fastest one of any Ford Performance model and 14 percent faster than the previous generation Fiesta ST. Larger 278mm ventilated front and 253mm solid rear disc brakes also improve stopping power.

More importantly, the chassis has been optimized with new Ford-patented force vectoring springs that make the turn-in sharper, improve the rear end's responsiveness and provide a generally more connected feel of the auto.

The special non-uniform, directionally-wound springs increase lateral forces when cornering but offer compliance at slower speeds.

It claims this new rear suspension system saves around 10kg compared to a Watts linkage arrangement and also delivers improved reactions to turn-in, directional changes and general steering input.

He says Ford also spent plenty of time making sure the Fiesta ST has the optimum suspension setup to be effective for hard driving, but comfortable for daily use.

Inside the vehicle offers a larger 6.5 or 8.0-inch Sync3 infotainment system with optional B&O Play sound system and ST-1, ST-2 and ST-3 equipment packs for further differentiation.

That's also good news, but what matters more for Fiesta ST buyers is how the auto will be like to drive.

Safety technology includes lane keeping assist, lane departure warning, cruise control with speed limiter, rain-sensing wipers, auto headlights, auto highbeam and traffic sign recognition.

"Performance auto drivers will be familiar with the dreaded 'one-wheel peel, where a fast corner exit is hampered by an overload of torque to the inside wheel", said Leo Roeks, Ford Performance Europe director.

While the new Fiesta ST remains front-wheel drive - unlike the all-wheel drive Focus RS - its other new development (this time standard) is a force-vectoring twist-beam rear suspension set-up.

"Performance vehicle drivers will be familiar with the dreaded "one-wheel peel", where a fast corner exit is hampered by an overload of torque to the inside wheel".

"We've tuned the all-new Fiesta ST's mechanical LSD option to work seamlessly with enhanced Torque Vectoring Control to deliver the best possible natural traction without "burning away" excess torque with brake interventions".

Other reports by Click Lancashire

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