80mpg from diesel-powered first-gen Insight

Yes, you read that correctly. AutoBlogGreen has released news that a company called Red Light Racing has installed Volkswagen's 1.2 litre, 3-cylinder Pumpe Düse TDI in a first-generation Honda Insight and the net result is 80mpg in US gallons - a staggering 96mpg imperial.

The engine has been taken from Volkswagen's Lupo 3L, a model that was only available in mainland Europe and itself made 94mpg imperial, equivalent to 3 litres/100km. The Lupo however was solely diesel-powered - and Red Light Racing state that they haven't even hooked up the Insight's hybrid motor to the diesel unit yet and once they do there could be another 15-20% improvement.

The Lupo 3L was highly modified from the standard Lupo TDI - like the Insight, it used aluminium in much of its construction, and also in common with the Insight it used low rolling-resistance tyres and a stop-start function to save fuel when stopped in traffic. The engine produces 61bhp and makes 140Nm of torque, which is 9bhp less than the Insight's 1.0 litre petrol IMA unit but a useful 27Nm more torque. Coincidentally, both Lupo 3L and Insight weigh in the region of 850kg, so the engine seems ideal for use in the Insight, though according to Red Light Racing the installation naturally wasn't too straightforward.

Diesel clatter aside, the new engine should provide very pleasant driving characteristics too. The final quote goes to Red Light Racing, clearly a company after Tarmac's heart: "The main idea was to take existing hardware, hack it, and make a vehicle that could be produced by major manufacturers or individuals that would deliver tremendous fuel economy without a tremendous leap in technology. I believe we succeeded."

Volkswagen 1-litre concept one step closer

News arrives via AutoBlogGreen that Volkswagen's 1-litre concept is still under development and nearing production reality.
The concept, now being named the L1, will be on display at the upcoming Frankfurt Motor Show and Volkswagen have released more details about the car and the engine that will be powering it in a press release that you can read in full on ABG's page.

The 1L has a 0.8 litre TDI developed from Volkswagen's new 1.6 TDI that makes its debut in the new Golf and Passat BlueMotion. Along with automatic stop-start, a 0.195 coefficient of drag and thanks to an all-in weight of only 380kg, the 1L is claimed to sip one US gallon of fuel every 170 miles, or 204mpg imperial (and only 36 grammes per kilometer of CO2). This works out at a little over the original 1l/100km that Volkswagen claimed, though I'm sure owners wouldn't complain as the eventual figure is still only 1.38 litres per 100km. Thanks to the light weight and slippery shape, the 1L also manages 100mph.
Volkswagen are now giving the car a tentative 2013 release date. Should give you time to save up...

Most frugal car in the real world? Autocar finds out with a race...

Manufacturers make big claims about their fuel economy figures. Occasionally, even these claims can be bettered, as Toyota's now closed blog for the iQ managed back in January, extracting 72mpg when Toyota themselves only claimed 65mpg. Often though, real-world driving prevents us from extracting the optimum economy from our cars.

Autocar's test then perhaps sheds a little more relevance on achieving high miles to the gallon. Armed with a Ford Fiesta Econetic, a Vauxhall Corsa Ecoflex, an Insight, a Prius, a BMW 116d and a Smart ForTwo CDi, they each hit the track at Bruntingthorpe with a single litre of fuel and a driver trying to achieve as many miles in the hour as possible. By working to distance rather than outright economy, it avoided the whole race becoming a slow eco-trundle.

The most efficient at the end of the hour? Ford's Fiesta Econetic. It achieved almost sixty miles at the hands of Matt Prior, equivalent - unsurprisingly - to roughly 60mpg. A little way short of Ford's 76mpg combined figure perhaps, but much more representative of what drivers can expect in their daily grind, and a long way from shabby.

The other cars in the test all managed to average around 55mpg, including the diminutive Smart despite being driven pedal-to-the-metal until it spluttered to a halt after 53 minutes.

The full story can be found in the 30th September issue of Autocar, out now. Alternatively, you can watch the video:

New VW Touareg sheds 200kg

Following in the Polo's footsteps, Volkswagen has revealed that the next version of their Touareg will shed as much as 208kg in the base model and offer up to 20% improvements in economy.

The weight saving amounts to as much as 10% removed from the kerb weight of the previous Touareg, and coupled with improved aerodynamics and updated engines, including a new hybrid motor, the new Touareg promises to be one of the most efficient large SUVs on the market.

According to Volkswagen's press release (available on ABG), the new Touareg also offers more space, more equipment (including stop/start technology) and more off-road biased options packages. Visually, the new car shares Volkswagen's family face first seen on the Scirocco, and it works well with the slightly more chiselled body, making the car look much smaller and more dynamic.

Of course, the weight savings on the Touareg will be reflected in the upcoming Audi Q7 and Porsche Cayenne, which share the same platform. Perhaps Volkswagen's step onto the treadmill will encourage other manufactures to do the same with their larger vehicles - the biggest gains can be found from improving the efficiency of the biggest vehicles.