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Volkswagen’s 3rd-gen Golf TDI BlueMotion rated at 73.5 mpg US; 15% better than predecessor

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New Golf TDI BlueMotion. Click to enlarge.

Volkswagen’s third-generation Golf TDI BlueMotion, introduced as a concept at the Mondial de l’Automobile in Paris last September(earlier post), is rated with fuel consumption of 3.2 l/100 km (73.5 mpg US) on the NEDC—equivalent to 85 g/km CO2. This represents a 15% improvement in fuel consumption compared to the previous model.

Volkswagen launched the first generation of the Golf BlueMotion in 2007.At that time, the Volkswagen set a new benchmark for sustainability with a fuel consumption value of 4.5 l/100 km (52.3 mpg US), or 119 g/km CO2. The second generation of the Golf BlueMotion—with fuel consumption of 3.8 l/100 km (61.9 mpg US), or 99 g/km CO2—made its debut in autumn 2009.

With numerous aerodynamic modifications, the Golf TDI BlueMotion achieves a Cd value of 0.27, contributing to its low fuel consumption. The aerodynamics of the TDI BlueMotion were enhanced, among other things, by a lowered chassis (by 15 mm), a special roof spoiler, a radiator grille that is almost closed to the outside (with integrated BlueMotion lettering), partially closed air inlet screens in the bumper, optimized cooling airflow and special underfloor panels.

Curb weight was reduced by 49 kg (108 lbs). The BlueMotion model also incorporates the features that are standard for all new Golf models: the Stop/Start system and battery regeneration mode; inner-engine modifications with the TDI; a wider spaced 6-speed manual gearbox; and tires with extremely low rolling resistance.

The new Golf TDI BlueMotion accelerates from 0-100 km/h in 10.5 seconds; in 4th gear, the Golf TDI BlueMotion accelerates in 9.0 seconds from 80 to 120 km/h (50 to 75 mph).

New TDI engine. The 1,598 cm3 turbo direct injection engine (TDI) is a four-valve four-cylinder engine of the new EA 288 range. It produces 81 kW (109 hp) in the engine speed range from 3,200 to 4,000 rpm. The TDI equipped with common rail injection develops a maximum torque of 250 N·m (184 lb-ft) starting at 1,500 rpm and running up to 3,000 rpm. As a result, the Golf TDI BlueMotion can be driven more frequently than on average with very low torques and thus in a very fuel-efficient operating range, VW suggests.

Construction details such as reduced internal friction (among other things, through piston rings with low pre-tension and the use of low-friction bearings on the camshaft); a novel thermal management system with shortened warm-up phase (e.g. separate cooling circulation loops for the cylinder head and the cylinder crankcase as well as a deactivatable water pump); exhaust gas recirculation (EGR), cylinder pressure sensor, two-stage oil pump and the water-cooled intercooler located in the intake lead to a further reduction of fuel consumption and emissions compared to the displaced engine.

For emissions control, Volkswagen also employs a NOx storage catalytic converter and a diesel particulate filter close to the engine.

Modified 6-speed gearbox. The engine’s power is transmitted to the wheels via a 6-speed gearbox. Volkswagen engineers tuned the gearbox especially for use in the new Golf TDI BlueMotion. Among other modifications, they integrated a 6th gear with a longer ratio for lowering the torque; moreover, the gearbox works with a new fuel-efficient oil featuring a low viscosity, which heightens its effectiveness.

Comments

HarveyD

Almost 74 mpg versus USA's new cars and light trucks fleet of about 24 mpg is a real 3X achievement in fuel efficiency.

A hand to VW for mass producing a fuel efficient car.

Let's hope that the 20+ other car manufacturers will do the same?

Will the new Passat TDI do (relatively) the same?

Bob Wallace

Apparently the Blue Motion TDIs won't pass US crash safety standards. Is that correct?

We get a heavier, larger engine TDI is seems.

Trevor Carlson

"(73.5 mpg US) on the NEDC" is not the same as 74 MPG rating average on the EPA test cycle.

http://www.caranddriver.com/features/the-truth-about-epa-city-highway-mpg-estimates-measuring-fuel-economy-page-2

If this vehicle isn't homologated to be sold in the U.S. why compare it to the U.S. version? Just give VW a hand for the improvements they've been able to achieve free of U.S. requirements. (namely safety and emissions)

HarveyD, if you still can't comprehend why the U.S. is different maybe you should start a petition to U.S. Congress to gut the EPA, NHTSA, DOT, etc. and move to copy Euro standards for passenger vehicles. Or just move to Canada or Europe and quit griping about U.S. vehicles not getting the best MPG.

HarveyD

BW is probably correct but why, are these the real reasons?

1. USA's people are heavier (not to say more obese)than EU's?
2. USA's families are larger than EU's?
3. USA's drivers have to compete with more Hummers than EU's?
4. Stronger Oil lobbies to satisfy?
5. Stronger Big-3 car manufacturers to satisfy?
6. Stronger Unions to satisfy?

It is certainly not a matter of safety and lower emissions.

HarveyD

One day, we may have a set of International Standards based on the metric system?

Km/L of diesel, gasoline, gasoline/ethanol mixture, NG etc would be interesting for ICEVs and/

Km/kWh for EVs would also be interesting.

HarveyD

With future improved communication between EV batteries and ultra quick chargers, the latter will automatically adjust the DC voltage and current density to satisfy various battery packs.

Standards for ultra high capacity connectors & cables remain to be designed and approved. EU is close to reaching an agreement.

Bernard

HarveyD,

You forgot the main reason why similar cars get worse mileage in the US: US EPA tests are tougher and compare much more favorably to real-life mileage figures.
According to a recent GCC article, EU figures are around 25% too optimistic, while US figures are within 10%.

That and the fact that air pollution is taken much more seriously in the US, which means that diesel cars need much more complex exhaust treatment systems than they do in Europe.
Mind you, Europe is catching on. The mayor of Paris recently proposed a ban on diesel cars in his city. It probably won't happen, but you never know. Health is more important than a few pennies saved at the pump.

kelly

If the Euro rating is dropped by 20%, it's still over 58 mpg - which makes 54.5 mpg very US doable (years ahead).

Carl

I don't really agree that the U.S. has much more strict emission regulations than Europe (as of Euro 5b and Euro 6 at least). The current Euro standards are less strict with respect to NOx compared to Tier 2/LEV II, but they're more strict with respect to both CO and particulate emissions (NMHC about the same as T2B5). The test duty cycles are not identical (FTP in the U.S. and NEDC in Europe) so direct comparisons may not be fully valid.

All new diesel vehicles certified in Europe are now required to meet a particle number (PN) limit (6X10^11 particles/km) which is a very restrictive limit (most gasoline cars can't meet that limit without a filter, especially GDI, even in the NEDC).

Presumably, this Golf TDI BlueMotion will be certified to Euro 6 since it will be implemented in 2014, although it's not explicitly stated in the press release.

HarveyD

Driving style is also another factor but very different 'on-board' cargo/passenger + vehicle weight may be more important to explain the differences. Another factor may be fuel quality differences. I didn't see any '87' gasoline for sale in EU during my last visit (6500 Km) but I didn't pay much attention to diesel fuel?

The average per vehicle/Km emissions are much lower in EU than in USA.

philmcneal

man why can't we get this car in AMKERICA huhuhuhuuh I want a highway cruiser damnit!

Peter_XX

In another news article, I saw that they referred to Euro 6. The car should have a NOx storage catalyst for NOx abatement. A recent article in the MTZ journal describes the technology of the new VW diesel engines. Larger vehicles will have a combined SCR catalyst and DPF.

Joe

Don't count on getting this kind of economy if you use this car mainly to drive to the supermarket and the kids to school.

Scott

HarveyD 87 Octane is not available in Europe. The lowest Octane is 89 (95 RON) Unleaded then there's premium which ranges between 97 and 99 RON depending on brand. Shell's V-Power Nitro is 99 RON I believe, as is Tesco's super unleaded - the latter being bad form mileage as ethanol has been used to provide the octane boost.

HarveyD

What are the effects of mpg?

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