Track-Optimized Fluidity: We Drive the 2027 Ariel Atom 4RR

When the Ariel Atom launched around the turn of the millennium, probably no one imagined that the lightweight British track car would evolve into the 4RR model of today—a 525-hp road-legal range topper based on the fourth-generation Atom and launched to celebrate the original’s 25th anniversary. In fact, the roughly 1500-pound “Double R” might be hard for U.S. buyers to conceive of, as only some lesser Ariel vehicles had been available stateside under a manufacturing licensing arrangement.

An exclusive new deal between Ariel and long-standing U.S. distributor Forman Motorworks changes that, with all Ariels and optional equipment now available to order via Forman for U.K. factory build slots. Customer deliveries in the U.S. are planned to start next summer.

The lineup includes the 4RR seen here, which is both the most powerful Atom ever and the most expensive at £208,000 in the U.K. (U.S. prices have yet to be confirmed, but we’d estimate $325,000.) That’s more than double the price of a very generously optioned 400-hp 4R model.

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Lower yourself into the Atom’s molded composite driving seat, thumb the start button, and feel the hand-built Civic Type R–derived turbo four-cylinder fizz through the steel-tube-frame chassis. Admittedly, the thought of blasting over the hedged lanes near Ariel’s rural base in Somerset, England, is more than a little intimidating. Yet even as the 4RR accelerates ferociously and telegraphs mechanical and road-surface detail like few other cars can, the big surprise is just how calm this extreme Atom feels.

Whether it’s the car’s refusal to be upset by midcorner bumps and awkward road cambers, or the drivability of the highly boosted turbo four, there’s an unexpected maturity and polish at play here. Even the Quaife six-speed sequential transmission can be soothed with a gentle brush of the clutch pedal. A handful of miles in, and our trepidation has already melted away.

Two things explain the 4RR’s fine road manners. The first is the clearly accomplished setup work overseen by race driver and former Top Gear Stig Phil Keen, and the second is some very expensive engineering.

The latter element includes reworked manually adjustable Öhlins dampers—which allowed Ariel to soften the inboard, pushrod-operated suspension—alongside a new aerodynamics package and 12.2-inch AP Racing brakes with four-piston calipers all around.

But the biggest investment involves the engine. Ariel doesn’t typically touch engine internals, but the 4RR’s previous-generation Civic Type R K20C unit has been completely reworked, blueprinted, and balanced in a process said to consume around 100 hours. Upgrades include forged connecting rods and pistons, closed-deck sleeves, and a revised cylinder head with improved camshafts, valve springs, and guides. A larger turbocharger runs nearly 25 psi of boost and is fed by an intercooler about twice the size of the 4R’s.

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The marquee numbers: 525 horsepower at 8200 rpm and 406 pound-feet of torque at 5200 revs. However, two tamer performance maps let you ease into it; there’s a 4R-matching 400-hp tune, as well as an intermediate 500-hp setting. Traction control and ABS are included and very welcome, both being driver adjustable through multiple stages, including fully off.

For such a small turbo four capable of producing so much power, the 4RR is disarmingly flexible at low revs and surprisingly progressive when it comes on boost, partly thanks to peak torque arriving at a far higher engine speed than in most modern turbocharged road cars.

That’s true in both the first two engine maps (despite the very noticeable step up in performance, including the intermediate map’s more substantial midrange boost), but it’s the seemingly modest 25-hp increase to the third and most powerful tune that transforms the experience. Still progressive and really quite tractable, it’s the searing, angry spit toward the 8200-rpm rev limiter that’s most noticeable, along with equally furious overrun pops. Throw in a few full-throttle, clutchless upshifts, and this amounts to delirious performance that—while usable on the road—is best reserved for an open racetrack.

Even then, traction from the 255-section rear tires is astonishing, at least in the hot, dry conditions of our drive. Whether launched off the line or subjected to a surge of midrange torque, the 4RR simply digs in and grips, thanks in no small part to compliant damping, sticky Yokohama A052 track-oriented rubber, and the weight of that Honda four pressing the rear tires into the tarmac.

Back-to-back drives in the 4RR and one of the first Atoms underlines the comedic jump in performance, but it’s the finesse of the 4RR chassis that’s more revealing of the car’s quarter century of development. Delightfully tactile as the original is, each individual wheel jiggles over bumps, and the car quickly becomes unstable if you back out of the throttle midcorner.

The 4RR retains comparable tactility but dials out the chassis noise and lifts the Atom’s capabilities to another level. The steering is super responsive but refuses to tug over tricky surfaces, the car’s balance is throttle adjustable but more forgiving of midcorner lifts, and crushing braking performance tames the engine’s power without causing the front axle to weave. For a circuit-optimized machine, the 4RR is exceptionally fluid on the road.

It’s easy to get caught up in the 4RR’s extreme nature and its hypercar-like power-to-weight ratio, but the real takeaway is how thoroughly Ariel has harnessed its intensity, creating a car that feels engineered around its performance, not overwhelmed by it.

2027 Ariel Atom 4RR
Vehicle Type: mid-engine, rear-wheel-drive, 2-passenger, 0-door roadster

ENGINE
turbocharged and intercooled DOHC 16-valve inline-4, aluminum block and head, direct fuel injection
Displacement: 122 in3, 1996 cm3
Power: 525 hp @ 8200 rpm
Torque: 406 lb-ft @ 5200 rpm

DIMENSIONS
Wheelbase: 94.1 in
Length: 138.6 in
Width: 74.0 in
Height: 44.2 in
Curb Weight (C/D est): 1500 lb

PERFORMANCE (C/D EST)
60 mph: 2.3 sec
100 mph: 5.1 sec
1/4-Mile: 9.0 sec
Top Speed: 175 mph

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