Driving a B4-TDI Passat
The first thing you notice is the spacious interior, largest interior of any VW, 2 cubic feet larger than a 300SD Mercedes Wagon.
Not like getting into a Jetta, more like getting into a Buick or a 500 series BMW or a large Audi because a B4V IS an Audi-bodied Passat, built by Audi in Germany. A 6'6" driver easily fits in the 8-way adjustable driver's seat. When that tall driver has the seat back an equally tall person can sit behind the driver and his knees will not touch the back of the driver's seat. Most Jetta rear seats are for kids.
Large bodied adults easily fit in the rear of a B4-TDI and its got five 3-point seat belts.
Engine - Transmission
Low RPM engine torque and a high ratio 5th gear transmission are two of the main reasons for the incredible MPG of a B4V-TDI.
Driving at 70 MPH in 5th gear the engine is running at only around 2200-2300 RPM. Most gas cars at 70 MPH are running at 3500-3800 (and sucking a lot of gas at that RPM)
At 80 MPH the B4-TDI engine is running at about 2700 RPM...
At 90 MPH the B4-TDI engine is running at only 3200 RPM
At 100 MPH the B4-TDI engine is running at only 3500 RPM
Gas cars that will go 100 MPH are running at about 5500 RPM are about to blow up
and are sucking a LOT of gas at that RPM.
The B4-TDI engine "Red lines" at 4800 RPM, so at 3500 RPM/100 MPH its still 1300 RPM south of its limit.
This is why a B4-TDI speedometer goes to 140 MPH.
These cars will go that fast, built for the left lane of the Autobahn. Very well built smooth driving high speed German car.
What all this means to the normal driver is that at 70 Miles per hour a B4-TDI engine is running at about half speed,
just loafing along at 70 miles per hour.
The engine running at low RPM gets great mileage!
Photo details - If you look at the clock on the dash you will see:
The 1st photo was taken at 3:49 at 90 Miles Per Hour, the trip meter was 42.5
The 2nd photo was taken at 3:51 at 100 Miles Per Hour, trip meter was 46.3, two minutes and 4 miles further down the road, then we slowed down to 80 MPH and 70 MPH
The 3rd photo was taken at 3:52 at 80 Miles Per Hour, trip meter was 47.7. one minute and 1.4 miles further down the road
The 4th photo was taken at 3:53 at 70 Miles Per Hour, trip meter was 48.5, one minute and 1.1 miles further down the road.