The hugely charismatic DAX 427 (formely known as Tojeiro) has remained the undisputed market leader for more than 30 years and has steadily established itself as a much-sought-after sports car classic in its own right. The car’s enduring popularity owes much to DAX’s policy of continual product improvement and painstaking attention to detail. A philosophy that has clearly shaped every aspect of today’s DAX 427 from its state-of-the-art technical specification, top quality composite body and sumptuous leather interior to its deep-dished Halibrand style wheels, trademark stainless steel side-pipe exhausts and low, wide, purposeful stance.

Complete price list Dax 427 (March 2024)

Estimate on building a Dax 427 De Dion

SPECIFACTIONS DAX 427 De Dion

Layout:
Front engine, rear wheel drive.

Chassis:
Robust multi-tube 75mm x 50mm x 3mm box-section chassis with comprehensive round-tube triangulation and extensively braced / triangulated backbone section. Chassis includes separate triangulated scuttle-hoop section, structurally laminated into internal body tub and bolted across entire main chassis structure for maximum rigidity. All brackets included for engine, transmission, rear hoop/s, seats, seat belts, door hinges, differential unit, suspension arms & links, steering rack, etc.

Body:
Gel-coat finished GRP body, hand-laminated in high-heat distribution resin. All internal panels – passenger compartment tub, boot tub and front inner wheel arches – jig bonded into position, for easy and accurate body / chassis assembly. Double-skinned bonnet, boot and doors. (No GRP work required by the builder.)
Note – Body and chassis are designed to interlock with bonded and riveted faces to form an integrated immensely rigid (rattle & squeak free) structure.

Safety:
Crumple zone design. Collapsible steering column (plus intermediate steering shaft offset with two UJs). Main chassis rails extend to full vehicle width for greater driver / passenger protection. Optional ‘Explosafe’ fuel tank.

As with all DAX vehicles, the 427 is designed to meet the full type approval standards of the UK’s IVA test.

Suspension/Axles:
Front
Front suspension system* using DAX upper wishbones, pivot bar assemblies, with Jaguar / Daimler (XJ40) steering knuckles, wheel hub/flange assemblies and lower wishbones. GAZ gas-filled coil-over damper assemblies with full adjustment for height and damping.

Rear
DAX De Dion rear suspension design using DAX axle beam, upper A-frame and lower radius arms with Jaguar / Daimler (XJ40) differential unit, driveshaft assemblies (modified to use CV inner joints), rear hub carriers and wheel hub/flanges. GAZ gas-filled coil-over damper assemblies with full adjustment for height and damping.

Differential Options :

Steering:
DAX rack and pinion steering (3 turns lock to lock) operated by Ford Sierra collapsible safety steering column.

Brakes:
Servo-assisted, dual-circuit, 4-wheel disc brake system using DAX pedal box and Ford servo & master cylinder (23.8mm diameter). Drum and shoe handbrake, operated by special DAX fly-off handbrake lever (drops to horizontal when not in use) – can also be sourced from Jaguar XJS.

Front
Jaguar / Daimler (XJ40) front discs and calipers, vented.

295mm diameter – from 1986 to ’90 (Girling brakes) 291mm diameter – from 1990 to ’94 (ATE brakes)

Rear
Jaguar / Daimler (XJ40) rear discs and calipers, non-vented. Handbrake function provided by centre, drum & shoe section, of each rear disc.

278mm diameter – from 1986 to ’90 (Girling brakes)
294mm diameter – from 1990 to ’94 (ATE brakes)

Wheels:
The DAX 427 De Dion can be fitted with 17” or 18” diameter wheels and tyres.

Engines and Transmission :
The DAX De Dion is designed to accept any commonly available V8 (English or American) or any Jaguar / Daimler (XJ40-based) unit. The most popular engine choice by far is the small-block Chevrolet V8 but DAX hold jigs for all common options.

Typical Performance: – with Chevrolet V8 (Approx. 400bhp)
0 to 60 mph: 4.5seconds
Top speed: 160+ mph, depending on gearing

* JK Sportscars will also be happy to undertake the fitting of other suitable units, subject to a modest tooling charge.

Dimensions:
Length – 4030mm (with nudge bars and overriders fitted)
Width – 1755mm
Height – 1110mm (to top of windscreen)
Wheelbase – 2280mm

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SPECIFICATIONS DAX 427 IRS

Chassis:
Hooped ladderframe constructed from 10swg, 3″x2″ steel box with comprehensive cross bracing. Additional stiffness provided by three dimensionalised front and rear sections and bonded and riveted body assembly.

Body:
Composite reinforced moulded fibreglass construction, with jig bonded internal panels. Bonnet, boot and doors all double skinned.

Components:
Jaguar XJ front and rear axle, braking and suspension components with DAX suspension geometry, front anti-roll bar, steering rack and Spax fully adjustable coil over dampers.

Engines and Transmission:
Any American or Rover V8, Jaguar straight 6 or V12 with 4/5 speed manual or automatic transmission.

Front Wheels & Tyres options:
9″ x Ø17″ Wheels with 235/45 R17  or 7½” x Ø15″ Wheels with 215/60 R15  or 8.5″ x Ø18″ Wheels with 235/45 R18

Rear Wheels & Tyres options:
10″ x Ø17″ Wheels with 255/45 R17 or 8½” x Ø15″ Wheels with 235/60 R15  or 10.5″ x Ø18″ Wheels with 295/35 R18

Dimensions:
4040mm long, 1745mm wide, 1130mm high, 2280mm wheelbase, 1010kg weight (with Rover V8) ready to drive.

Performance:
Rover V8: 0 to 60 mph 7.5 secs. Top Speed 130 mph.
V8 (Approx. 400bhp) : 0 to 60 mph: 4.5seconds – Top speed: 160+ mph, depending on gearing

Engines and Transmission :
The DAX  427 IRS is designed to accept any commonly available V8 (English or American) or any Jaguar / Daimler (XJ40-based) unit. The most popular engine choice by far is the small-block Chevrolet V8 but DAX hold jigs for all common options.

* Subject to changes and incorrect entries.