Volkswagen plots a faster, more efficient Mk8 hot hatch with an integrated start motor offering a boost function
27 January 2017

The next-generation Volkswagen Golf GTI is set to adopt a mild hybrid powertrain that promises to boost performance and refinement while reducing fuel consumption and emissions compared with the recently facelifted current model.

The adoption of an advanced 48V electrical system and integrated starter motor on the new hot hatchback is part of a powertrain overhaul that will be reflected across the whole Mk8 Golf line-up. The changes are also set to make the new model the most powerful series-production Golf GTI yet.

Although the new Golf GTI is still three years away from its introduction, sources close to Volkswagen research and development boss Frank Welsch have revealed that the initial performance targets point to a power output similar to the 261bhp of the limited-edition Golf GTI Clubsport.  

Scheduled to go on sale in the UK in 2020, the new Golf GTI will retain an internal combustion engine: VW’s familiar turbocharged 2.0-litre petrol unit.

However, the introduction of the 48V electric system will allow the four-cylinder engine to receive comprehensive modifications. It’s likely that the exhaust gas turbocharger of today’s model will make way for an electrically operated compressor that offers improved low-end response and a broader plateau of torque for added flexibility.

Crucial VW ID concept - click here for more

Additionally, the integrated starter motor will allow VW to provide the front-wheel-drive Golf GTI with a so-called boost function in which an electric motor mounted in the front section of its standard-fit seven-speed dual-clutch automatic gearbox supplements the combustion engine in Performance mode.  

A year into its development

The eighth-generation Golf has been under development for more than a year now, with key aspects of the car already described by high-level Volkswagen sources as having committed project status.

Despite the upheaval brought to its operations by the diesel emissions manipulation scandal and subsequent legal complications in key world markets, Volkswagen has confirmed that it is holding firm to the original launch schedule for the new model. That means volume-selling versions of the new Golf are planned to reach UK showrooms during the final quarter of 2019.

VW has laid the foundation for both cylinder shutdown and engine-off coasting functions in the turbocharged 1.5 TSI Bluemotion petrol version of the updated current Golf through the adoption of a twin 12V electrical system. Now Autocar can confirm that the company is set to take the fuel-saving technology one step further.

The company is planning a more contemporary, 48V system that will enable the next Golf to be more comprehensively networked for more intuitive operation and greater fuel savings, particularly with petrol versions of the car.

Uses update of Mk7 platform

The basis for the next Golf is an updated version of the versatile MQB platform used by today’s model. Volkswagen insiders suggest it will use a greater percentage of lightweight metal than the existing structure for a 50kg reduction.

Planned modifications to the construction process are also said to provide for more streamlined production and reduced build times as part of moves aimed at improving the economies of scale and profitability of Volkswagen’s best-selling model.

Although there are still three years to go before the new Golf’s introduction, Volkswagen says it has already locked in the car’s design, which has been developed under the guidance of the company’s latest design boss, Michael Mauer, who was responsible for the styling of the current Porsche line-up.

Those privy to the latest clay model mock-ups of the new car say it progresses the classic hatchback look of its predecessors, with familiar proportions, reinterpreted details and simple surfacing to make it instantly recognisable as a Golf.

Key styling features described to Autocar include a thin horizontal grille bookmarked by smaller angular headlights than those in use today, with a distinctive LED daytime running light graphic.

The new car is also said to have more pronounced wheel arches and a heavily defined side swage line, in combination with typically wide C-pillars and a relatively upright tailgate.

Three-door stays but no cabrio

VW plans three different bodystyles: a three-door hatchback, a five-door hatchback and an estate. There are no plans to develop a successor to today’s cabriolet.

With a moderate increase in track widths at the front and rear, along with a slightly longer wheelbase and reduced rear overhang, the new Golf is said to offer greater interior space than the current car. As with the exterior, the cabin has been designed to be familiar to existing Golf owners.

The standard specification is set to include analogue instruments and controls, but as with the recent facelift, there will be options of high-definition Active Info Display digital instruments and a central touchscreen infotainment monitor.

Also planned are new gesture and conversational speech control functions in combination with connectivity and networking features currently being pursued by VW’s digital boss, Johann Jungwirth.  

Other systems will include autonomous driving functions — also a feature of the recent facelift — including a traffic jam assistant that will allow the driver hands-off operation at speeds of up to 37mph.

Petrols, diesels and hybrids

With VW’s ID electric line-up on the way, the eighth-generation Golf will have a range of petrol, diesel and hybrid powertrains. The adoption of the 48V electrical system indicates that Volkswagen is placing greater emphasis on petrol units than in past generations, with functions such as cylinder shutdown and engine-off coasting set to become standard on many models.  

The new or upgraded powertrains will be offered in combination with either a six-speed manual or sevenspeed dual-clutch automatic gearbox, depending on their configuration. Alongside frontwheel drive, Volkswagen also plans optional four-wheel drive 4Motion in selected models in a repeat of the previous four generations of its perennial best seller.  

On the petrol side, the entry-level models will forgo the existing turbocharged 1.2-litre four-cylinder engine of today’s model for the lighter turbocharged 1.0-litre threecylinder unit already launched in the latest Golf.

The existing turbocharged 1.5 TSI engine, which made its debut as a replacement for the older 1.4 TSI in the facelift, is set to be upgraded with a particulate filter. This move is aimed at providing lower tailpipe emissions to help achieve the EU’s prescribed 95g/km fleet average CO2 levels by 2020.

It will come as standard, with both the cylinder shutdown and coasting functions to be offered in the newly unveiled seventh-generation Golf TSI BlueMotion Edition, which already has a claimed average CO2 rating of 104g/km.

New 1.5-litre diesel on the way

Diesels will include a yet to be revealed 1.5-litre fourcylinder unit as a replacement for today’s 1.6 TDI. There will also be an updated version of today’s 2.0 TDI in at least three different power outputs.

Both diesels will be coupled with a newly developed SCR (selective catalytic reduction) system, which is claimed to contribute to a 10% reduction in CO2 levels compared with today’s diesels.

Secrecy surrounds Volkswagen’s hybrid plans, although supplier sources close to its engineering operations suggest the turbo 1.4-litre four-cylinder petrol engine used in today’s Golf GTE could be supplanted by a cheaper, naturally aspirated version of the German car maker’s 1.5-litre petrol unit in a move aimed at reducing production costs.

Our Verdict

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Comments
9

27 January 2017
.....Without it costing £50k. Sounds like a lot of kit to fit in on a budget.

Although this is probably mostly speculation above. In reality the features mentioned will only be on top spec cars.

I am looking forward to the new golf r in 3-4 years, so long as VW don't have a mark III gti moment. Hope not.

Spanner

27 January 2017
I'd be quite happy enough with a lighter 225hp ICE one for £5,000 less (remember an A3 e-tron is £36,000). You'd hardly miss extra 50 or so hp and the petrol/tax advantage would be minor over 3 years.

 

Hydrogen cars just went POP

27 January 2017
xxxx wrote:

I'd be quite happy enough with a lighter 225hp ICE one for £5,000 less (remember an A3 e-tron is £36,000). You'd hardly miss extra 50 or so hp and the petrol/tax advantage would be minor over 3 years.

Having re-read article it sounds simpler than A3 system i.e. not a true Hybrid so maybe it only adds a bit more weight and £2,000 to the price. Still rather have a pure ICE though

 

Hydrogen cars just went POP

27 January 2017
I couldn't care less what VAG do.

27 January 2017
405line wrote:

I couldn't care less what VAG do.

Tell me what you care about 405line. If not VAG, what bothers you? Tell your uncle spanner.

Spanner

28 January 2017
It will detect if its in an emission test situation and try to limp all the way round it using just the beefed up starter motor and a boot full of batteries, expect impressively low tax bills.

28 January 2017
I am thick: accepted! What is the point of a massively beefed-up starter motor? Go the whole hog and make the starter motor the engine, no?
Now, in the real world, VW sell many more cars to under-developed countries than advanced countries: how will they reconcile such complicated vehicles with simplistic infrastructures? A two-tier marketing exercise?
Will that technology extend to commercial vehicles, too?
The cylinder shutdown exists already on some versions of the 1.4 engine: have all the bugs been ironed out? Reading the on-line forums suggest different...
My next car is likely to be another VW (leasing has more or less locked me in) but I will look VERY carefully at what is on offer before making a decision, for sure!

TBC

29 January 2017
The 48v system is needed to effectively power an electric turbine. The starter motor, if I understand correctly, will work in a similar fashion to the system on the McLaren P1, by providing additional torque during acceleration. Power for this can be stored in supercapacitors rather than batteries. In this way, a much smaller engine can be tuned to provide the performance of a much larger one. However, the above system is not a 'hybrid' in the sense it cannot run on pure electric power alone.

29 March 2017
If they are going to fit a particulate filter to the 1.5TSI petrol engine will it have the same problem as a diesel particulate filter in that if you only do short trips it clogs up?

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