Discussions of conventional and alternative energy production technologies.
by MarkJ » Sat 04 Oct 2008, 14:04:07
$this->bbcode_second_pass_quote('yesplease', '')$this->bbcode_second_pass_quote('MarkJ', 'M')ore Euro Diesel Hype. The Euro Test Cycle substantially inflates the fuel economy numbers. The Toyota Prius is rated @ 4.3L/100km (54.7 MPG) Combined in the Euro Test cycle.
The Euro test cycle is very city heavy. something like 3/4s of the cycle is simulated city at an average speed of ~12mph, so the Prius would likely benefit quite a bit from that. A conventional car otoh, probably would end up hurting a bit more on the Euro test cycle, so I imagine the difference between U.S. and Euro mileage for this model isn't as big as it is with the Prius.
Their Urban Test Cycle Rates
The Toyota Prius at a more realistic 5.0L/100km (47 MPG).
$this->bbcode_second_pass_quote('', '[')b]Urban cycle
The urban test cycle is carried out in a laboratory at an ambient temperature of 20°C to 30°C on a rolling road from a cold start, i.e. the engine has not run for several hours. The cycle consists of a series of accelerations, steady speeds, decelerations and idling. Maximum speed is 31 mph (50 km/h), average speed 12 mph (19 km/h) and the distance covered is 2.5 miles (4 km). The cycle is shown as Part One in the diagram below.
Extra-urban cycleThis cycle is conducted immediately following the urban cycle and consists of roughly half steady-speed driving and the remainder accelerations, decelerations, and some idling. Maximum speed is 75 mph (120 km/h), average speed is 39 mph (63 km/h) and the distance covered is 4.3 miles (7 km). The cycle is shown as Part Two in the diagram below.
Combined Fuel Consumption FigureThe combined figure presented is for the urban and the extra-urban cycle together. It is therefore an average of the two parts of the test, weighted by the distances covered in each part.
EPA Federal Test ProcedureHere's a classic example of Euro Diesel Hype
2009 Jetta BlueTDI Comes to US This Summer, Sports 60 MPG and Cleaner EmissionsThe EPA rates the 2009 Jetta TDI @ 29/40 (Automatic) 30/41 (Six Speed Manual)
In
This Review they're averaging 7.4L/100km (31.7 MPG) Overall.
$this->bbcode_second_pass_quote('', 'T')he all-important number here is its fuel consumption average. Well, in our hands, the TDI is averaging 7.4 L/100 km, which is pretty good considering we didn't do much highway mileage. We seriously doubt you'll rack up 1,100 km on a single tank like VW is claiming (which is basically the 55-litre tank averaging 4.8 L/100 km), but if you've got a light right foot, you'll get close to a thousand kilometres for every tankful.