1982 Dietel-Alpina 345i

1982 Dietel-Alpina 345i

1982 Dietel-Alpina 345i

Leading up to this car, Mike Dietel was importing European-spec BMWs for the west coast market. With a keen eye to create the most dramatic 3 series possible, he envisioned this car which was the last to come from Dietel Enterprises in Laguna Hills, California. Engineer Tom Coleman extensively reworked the entire car including engine, chassis and interior modifications.

The basis for this 345i was the 3.2-liter engine from the 745i with mild forced induction. Turbocharged to 7.5 pounds of boost, 310 to 340 bhp was available which was quite a bit in 1982. Power was sent to the rear wheels through a close-ratio Alpina five-speed transmission and limited-slip differential. Despite the bulk under the hood, Dietel still found room for the air conditioning system.

To deal with the increased power, Dietel significantly upgraded the chassis with triangulated chrome-moly tubing. Furthermore, the suspension components were upgraded with chrome-moly replacements including Bilstein/Alpina coilovers and drop link front sway bars. Brake rotors from the BMW M1 were also installed with Lockheed Martin 4-piston calipers.

The distinct wide-body kit was a new design which Dietel hoped to market. It was built from fiberglass by Wayne Hartman Fiberglass. The design predated the E30 M3 which effectively replaced this type of car. One major criticism of the design was the American-spec bumpers which were much larger than their European counterparts.

At their 2009 auction, Barrett-Jackson sold the only Dietel 345i for $30,800.00 USD.

Story by Supercars.net

In Detail

typeProfessionally Tuned Car
built atLaguna Hills, California, USA
price $$ 64,000
positionFront Longitudinal
aspirationTurbochargers w/Alpine/KKK Wastegate
fuel feedL-Jetronic Electronic Injection
displacement3210 cc / 195.89 in³
power231.2 kw / 310 bhp @ 6000 rpm
specific output96.57 bhp per litre
bhp/weight229.13 bhp per tonne
torque497.6 nm / 367 ft lbs @ 2600 rpm
body / frameUnitary Steel Monocoque
driven wheelsRWD
wheel typeBBS 3-piece Alloy
front tires225/50VR-15 Pirelli P7
rear tires285/40VR-15 Pirelli P7
front brakesBMW M1 Ventilated Discs w/Lockheed Martin 4-Piston Calipers
rear brakesBMW M1 Ventilated Discs w/Lockheed Martin 4-Piston Calipers
front wheelsF 38.1 x 22.9 cm / 15 x 9 in
rear wheelsR 38.1 x 27.9 cm / 15 x 11 in
steeringRack & Pinion w/Power Assist
f suspensionMacPherson Struts w/Bilstein/Alpina Coil-Overs
r suspensionAlpina Coil-Overs
curb weight1352.92 kg / 2980 lbs
weight distro57 % / 43 %
wheelbase2540 mm / 100 in
front track1397 mm / 55 in
rear track1435.1 mm / 56.5 in
length4343.4 mm / 171 in
width1727.2 mm / 68 in
height1333.5 mm / 52.5 in
transmissionAlpina Close-Ratio 5-Speed Manual
gear ratios3.42:1, 2.07:1, 1.47:1, 1.16:1, 1:1
0 – 60 mph~5.5 seconds
0 – 100 mph~14 seconds
0 – 1/4 mile~14 seconds
fuel capacity49.20 litres or 13 gal.