Toyota Yaris GRMN

Wednesday 25 October 2017

Inspired by Motorsport, Engineered for the Road

Intensive development work has continued on the Toyota Yaris GRMN since its public debut at this year’s Geneva motor show, in preparation for the high-performance model going into production at the end of the year. A dedicated engineering team has been fine-tuning its performance and handling at a test centre close to the Nürburgring circuit in Germany.

The Yaris GRMN is inspired and influenced by the Yaris WRC, the car with which Toyota has returned to the FIA World Rally Championship, with event-winning success. Its performance focus is broadcast by its lightweight 17-inch BBS alloy wheels, larger brakes, central oval tailpipe and a bespoke exterior finish that displays Toyota Gazoo Racing’s white, black and red competition colours. Under the bonnet is a 1.8-litre engine, tuned to produce 209bhp and benefiting from a supercharger, a feature unique among B-segment performance hatchbacks.

Yaris_GRMN_Dynamic_v2_008 (Large)

Development at the Nürburgring
Right from the completion of the first Yaris GRMN concept in 2015, a prototype was sent to a Toyota facility close to the legendary Nürburgring race circuit in Germany. Here a select group of Toyota tuning specialists from Europe and Japan have honed the car’s handling and performance, working both on track on the famous Nordschleife and on the wide variety of roads found in the immediate neighbourhood – from ultra-fast Autobahns to tightly winding mountain routes. Toyota’s belief is that if the car can prove its capabilities in this environment, it can do so anywhere.

Yaris_GRMN_Static_v2_002-1000x668 (Large)

The name GRMN itself declares the special efforts that have been invested in the car, standing for Gazoo Racing tuned by the Meister of the Nürburgring. The team working on the car have developed their skills through participation in motor sport, working side-by-side with racing professionals, and through sports car development programmes. They have also been able to draw on the competition experience gained by Toyota Gazoo Racing at the circuit.
Even since the car’s show debut in Geneva, work has continued to define the optimum shape of strategic areas of the bodywork. Every part has been painstakingly reconfirmed so that the Yaris
GRMN is in perfect trim for the start of production at Toyota Motor Manufacturing France’s Valenciennes plant this autumn. Production will be supervised by a team of TMMF’s most skilled members and each car will undergo a special quality control check, including a specific test drive.

SEB7440-1000x667

Engine and performance
The heart of the Yaris GRMN is its 1,798cc four-cylinder engine, a 16-valve unit equipped with a Magnusson Eaton supercharger and Dual VVT-i intelligent variable timing for both inlet and exhaust valves. The 2ZR-FE unit is built by Toyota Manufacturing UK and has been specially adapted for use with the smaller Yaris platform.
With a 10:1 compression ratio, it delivers a maximum 209hp (156 kW) at 6,800 rpm and peak torque of 250Nm at 5,000rpm. Driving the front wheels through a six-speed manual transmission, the engine enables nought to 62mph acceleration in around 6.3* seconds; top speed is electronically limited to 143mph.
Installing the supercharger presented a particular challenge, as only very limited space was available in the Yaris GRMN’s engine compartment. The packaging solution combines the supercharger, cooling and air intake together in a single, space-saving stacked unit. Cooling is crucial, so there is an intercooler for the supercharger and an oil cooler, both located in front of the radiator, and an enlarged air intake to support better engine breathing. The fuel system has also been upgraded, using components from a V6 engine.
With kerb weight kept down to just 1,135kg, the Yaris GRMN achieves the best power-to-weight ratio in its class at 5.35kg per 1bhp.

Yaris_GRMN_Dynamic_v2_011-1000x668

Chassis and handling
To ensure Yaris GRMN’s power is transferred smoothly to the road, the car is equipped with a Torsen limited-slip differential. Chassis stiffness is enhanced with a lateral bar across the engine bay, between the front suspension towers, with further front and rear chassis underbody bracing.
Shorter springs allow the car to hug the ground more closely (24mm lower than the standard Yaris) and these are teamed with dedicated performance shock absorbers, developed with Sachs, and a larger diameter (26mm) front anti-roll bar. The suspension is a development of Yaris’s front MacPherson strut and rear torsion beam design.
To achieve razor-sharp braking controllability, the 275mm-diameter grooved front disc brakes are fitted with four-piston callipers; 278mm discs are featured at the rear. The calipers are a stand-out feature, painted in signature Toyota Gazoo Racing white and visible through the slim spokes of the alloy wheels. The wheels are 17-inch BBS lightweight multi-spoke alloys which not only save weight but also provide sufficient space for larger brakes to be used. Fitted with Bridgestone Potenza RE050 205/45R17 tyres, they also contribute to the car’s very precise steering feel.

Yaris_GRMN_Mte_Detail_004-1000x668

Performance exhaust system
The exhaust has been fully reworked, a task that had to be achieved within very tight space limitations, and with careful attention to underbody heat management. The goals were to reduce exhaust back pressure and to control emissions and noise levels. Success in this task has enhanced engine power and produced a rousing exhaust note. The design has also helped reduce the car’s overall weight.

SEB7449-1000x667

Body and styling
Like its world rally counterpart, Yaris GRMN uses a three-door version of the new Yaris bodyshell. It introduces a number of dedicated features including a black, wing-type rear spoiler, bespoke rear bumper design, rear diffuser, honeycomb front grille and – again echoing the rally car’s styling – a central oval exhaust tailpipe.
It also sports a special paint finish – white with red and black flash detailing on the bonnet and sills, echoing the livery of the Toyota Yaris WRC, and a black roof with a unique-in-segment black shark fin antenna. The front lip is picked out in red and the LED headlights are given extra visual impact with the addition of black upper ornamentation.

Yaris_GRMN_Mte_Detail_014 (Large)

Cabin design

Yaris_GRMN_Mte_Detail_012-1000x689
The cabin is equally an expression of the car’s performance focus, with front sports seats designed specifically for the car by Toyota Boshoku, providing best-in-class body holding and support.
The authentic performance details include an engine start button and a small-diameter,
leather-wrapped steering wheel, sourced from the Toyota GT86 coupe and further adapted to suit the special requirements of the Yaris GRMN. There is also an aluminium sports pedal set, aluminium trim detailing and a bespoke, high-grade instrument panel with TFT display, designed to reflect the car’s special performance character.

Yaris_GRMN_Mte_Detail_003-1000x601

Sales and pricing
Just 400 Yaris GRMN will be available to European customers, including both right and left-hand drive models. In the UK the car has an on-the-road price of £26,295 and is available for pre-ordering now.
* Subject to final homologation

Technical specifications
Performance figures are provisional, subject to final homologation.

ENGINE
Engine code 2ZR-FE
Type 4 cylinders, in-line
Valve mechanism DPHC 16-valve with Dual VVT-i
Fuel system EFI
Supercharging Magnusson Eaton rotor-type supercharger
Displacement (cc) 1,798
Bore x stroke (mm) 80.5 x 88.3
Compression ratio 10.0:1
Max. power (bhp/kW @rpm) 209/156 @ 6,800
Max. torque (Nm @ rpm) 250 @ 5,000
Emissions level Euro 6 (b)

TRANSMISSION
Type 6-speed manual
Gear ratios
1st 3.528
2nd 1.913
3rd 1.310
4th 0.971
5th 0.714
6th 0.619
Reverse 3.333
Differential gear ratio 4.214

PERFORMANCE
Weight/power ratio (kg:bhp) 5.35:1
Max. speed (mph) 143 (electronically limited)
0-62mph acceleration (sec) 6.3 – 6.5

FUEL CONSUMPTION & EMISSIONS
Combined (mpg) 37.7
Fuel tank capacity (l) 42
CO2 emissions, combined (g/km) 170

SUSPENSION
Front suspension
Type MacPherson strut
Spring rate (N/mm) 34.6
Anti-roll bar diameter (mm) 26
Shock absorbers Sachs performance
Rear suspension
Type Torsion beam
Spring rate (N/mm) 34.2
Shock absorbers Sachs performance

STEERING
Type Electric, rack and pinion
Overall ratio 12.8:1
Turns lock-to-lock 2.28
Min. turning circle
Tyre (m) 10.2
Body (m) 11.0

BRAKES
Front (disc diameter x thickness mm)
Ventilated, grooved discs 275 x 25
Four-pot calipers
Rear (disc diameter x thickness mm)
Solid discs 278 x 9
Single-pot calliper

WHEELS & TYRES
Wheels 17-inch BBS alloy
Tyres Bridgestone Potenza RE050 205/45R17

EXTERIOR DIMENSIONS
Overall length (mm) 3,945
Overall width (mm) 1,685
Overall height (mm) 1,510
Wheelbase (mm) 2,510
Front track (mm) 1,465
Rear track (mm) 1,455
Running ground clearance -24mm vs standard Yaris
Coefficient of drag (Cd) 0.312

INTERIOR DIMENSIONS
Interior length (mm) 1,915
Interior width (mm) 1,420
Interior height (mm) 1,250
Boot capacity (l) 286

WEIGHTS
Kerb weight (kg) 1,135
Gross vehicle weight (kg) 1,545

Comments

comments

comments powered by Disqus