Thank goodness for the Eisenhower Tunnel! Could you imagine trying that on the old (still there) US 6? On the way back from L.A. back in '90 in my '82 Audi 5000 turbo diesel (5 cyl 2.2L IDI) I went charging up to Eisenhower at full boost of 8 psi and 58 mph. I passed a Corvette struggling along at about 35mph like it was going backwards. Wish I still had that car, Teutonic ride and handling sedan that got 32-38 mpg hiway. Unfortunately they were notorious for undersized/inefficient cooling systems in the diesel configuration (because of the length of the straight five engine in gas and diesel models, the radiator was off along side the engine on the driver's side at an angle, with a duct bringing air over. The diesel had a small12"x8"x1 1/4" auxiliary radiator in front of the engine behind the grill. Hot weather with A/C was the death of most of the turbo and N/A 5000 diesels, as the engine would over heat and cause the rings to lose their temper and thus their ability to seal against the cylinder wall. The result would be that it would start to burn oil (from the crankcase, not the fuel tank

) at an ever increasing rate and lose compression due to blowby at the same time. Mine succumbed to that fate on a run down to K.C. on I-29 at 80 mph with the A/C on on a nice balmy 104* July 4th day. Got into stop and go traffic in town and the temp gauge started climbing into the red and the head temp overheat warning light kept coming on. I was fast idling it while stopped in traffic to keep coolant flowing, with the A/C off, heater on and sunroof open all while the electric fan was running non-stop on the radiator. When I got to where I was going, I sat in the parking lot letting the engine idle down for almost 30 minutes and the damn temp gauge still stayed just into the red zone and the head temp lamp would flick on and off and the cooling fan never shut off on the radiator. Not to be late, I finally shut the engine off, figuring the cooling fan would shut off once the radiator cooled down. Came back five hours later and the 1000 amp battery was deader than a door nail - the electric fan never shut off and ran the battery dead! The heat soak was that bad! That started the end of the motor, as it began using oil at an ever greater rate, from a quart every 1,000 miles to the point a year later it would use two quarts just to run up to Omaha and back (120 mi round trip) and finally wouldn't start one summer day, even cycling the glowplugs three or four times, because the compression was so low.
That was back in '93. Cost to re-ring it back then was over $2K, it was $500 just for the head gasket and another $600 for the rings and that's IF it didn't need an over bore and next size up pistons due to the cylinder walls being smooth!!! Pistons would have added another $1200!!! For FIVE pistons!!! Hell of it was the car had only 68,000 miles on it, 50,000 of it easy motoring in L.A. when my grandfather owned it. Wish I still had that car now, and would have fixed the motor back then.
We won't go into the '74 Peugeot 504 diesel 4-speed stick I had back in college back in '80-81. N/A and a whole whopping 48 hp in a 4,000 lb car. The lead pig, but it got 25-28 mpg city and 34 on the hiway back when diesel was $0.30/gal. Great on a cheap college student's budget - left way more money for beer:thumbsup: when it cost me only $8 a month for fuel:shocked:!