Description
BMW 733i | 1978
Highlights:
- Valid technical inspection certificate
- LPG injection system installed with valve lubrication for efficient dual-fuel operation
- Recent mechanical work including new exhaust, suspension components, and major service
- Retains factory options uncommon for its year, like power steering and disc brakes all around
- Automatic transmission
The seller offers for sale this 1978 BMW 733i Sedan, an early example of BMW’s flagship 7-Series range, imported last year from southern Spain. It features the distinctive sharknose front end, which was a defining design element of the first-generation E23 series. Power comes from a 3.3-litre inline-six engine coupled to an automatic transmission, and the car has been converted to run on LPG with an injection system and valve lubrication. The conversion was performed in October 2024 and is documented along with a valid inspection for two years.
Technically, the car has undergone maintenance over the past half-year. Replacements include a complete new, original exhaust sourced from Germany, new NOS Koni shock absorbers on the rear and Monroe units on the front, valve adjustments, new ignition components, brake system revisions, and refreshed fluids including engine oil, differential oil, and transmission fluid. Further improvements consist of overhauled driveshaft components, a new water pump, alternator, thermostat, belts, radiator fan, cold start injector, and other critical parts. The car is equipped with factory power steering and disc brakes all around. It stands on original wheels and still retains its factory underbody coating. An original BMW tow bar, chromed right-hand mirror, and the period-correct BMW radio (not yet installed but included) complete the package.
Cosmetically, the car is in generally solid shape, though it shows some typical signs of age and previous life in Spain. The paint is largely original and in good condition but exhibits areas faded by the Spanish sun and a few minor dents, described as “Spanish dings,” which should be repairable without respraying. The overall appearance remains honest and well-preserved.
Inside, the BMW features seats upholstered in buffalo leather, which was a premium choice at the time. While the upholstery is mostly tidy, there are a few cracks in the front seat covers that the seller considers non-intrusive. The air conditioning system works but requires a fresh refill to operate optimally. The interior presents typical wear consistent with age but maintains its character and period features, including the original carpets and matching replacement boot mat. Major controls, gauges, and lighting systems are functioning as intended. The car holds a valid technical inspection certificate.
The BMW 7-Series debuted in 1977 as the E23 generation, replacing the BMW E3 “New Six” sedans. The 733i was among the upper-tier models in the range, powered by BMW’s M30 straight-six engine—a robust and respected unit known for durability and smooth operation. This generation introduced significant advancements for BMW, including innovations in onboard electronics, fuel injection systems, and driver comfort features. While many cars of the period remained relatively spartan, the E23 offered luxuries like climate control, electric windows, advanced radios, and even optional anti-lock braking systems in later years. The distinctive “sharknose” styling, characterized by the forward-slanting front grille and sharp body lines, cemented BMW’s design language throughout the 1980s and continues to be revered among enthusiasts today.
During the late 1970s and early 1980s, BMW was keen on positioning itself as a maker of luxury cars that still prioritized driving engagement. The 733i delivered precisely that blend—executive comfort with a sporty edge, underpinned by precise steering and a balanced chassis. The E23 also marked BMW’s push into international markets, including the U.S., where stricter emissions rules often required changes to engine specifications and trim levels. In Europe, however, cars like this 733i retained their original mechanical configurations, contributing to their desirability among collectors seeking authentic models.
Collectors value the E23 not only for its elegant styling and mechanical durability but also for its place in BMW’s history as the foundation for all future 7-Series models. Survivors in solid, largely original condition—particularly those free of rust and extensive modifications—are becoming increasingly sought-after. This specific example, with its southern Spanish origin, LPG system for economical driving, and considerable recent mechanical investment, offers an opportunity to own a piece of BMW heritage that can still be enjoyed on modern roads.
Condition of the Bodywork and Paint
3. Good: Repairs to the bodywork and paint may be needed, possibly requiring part replacements.
Condition of the Interior
3. Good: Shows typical wear; may require some repairs or part replacements.
Technical Condition
4. Very Good: Mechanically solid, with possible minor maintenance required.
Overall Condition
3. Good Condition: May need some mechanical and cosmetic repairs, but can drive.
This item is sold on an as-is basis. The condition of this item is the opinion of the seller and may differ from your own opinion. Photos and descriptions of the listing are for information purposes only.
We encourage all potential bidders to inspect the vehicle before placing a bid. Please contact us by phone or email to schedule an appointment.
All auction cars offered have a reserve price. You have only won the item if the seller accepts your bid.
Price changes and errors reserved. The 14-day right of withdrawal does not apply to this auction.
This car is currently located in North Brabant province, the Netherlands.
This car drives, brakes and shifts.
The car has a Spanish registration. The buyer is responsible for registration in his own country and responsible for delivery and collection of any vehicle purchased at the auction.
The description of this car is, to the best of the seller’s knowledge, accurate and not misleading. Route 66 Auctions requests a range of detail about the car from the seller and performs a level of due diligence. However, potential buyers must independently satisfy themselves as to the accuracy of the description. We strongly advise potential buyers to view or arrange inspections as well as conduct any research they feel is necessary before committing to bid or buy.
Please note that it is not uncommon for classic or collectible cars to have received cosmetic repairs in the past, to rectify damage or refresh appearance, and this work may be hard to see even upon visual inspection. Unless there is an explicit statement by the seller to the contrary, please assume that any vehicle could have had bodywork or paintwork. Photographs may not reflect the exact true colour or exact full condition of the vehicle. It is a bidder’s responsibility to assure themselves of the colour and condition of a vehicle, including its interior and the existence of any remedial bodywork or paintwork, before committing to bid or buy.
