1979 | Porsche 911 Turbo

Technical Information

Lot Number:5090

Year:1979

Make:Porsche

Model:911 Turbo

Mileage:31485

Drivetrain:RWD

VIN:9309800147

Transmission:Manual

Engine:3.3L Turbocharged Flat-Six

Location:Punta Gorda, Florida 33950

Title Status:Clean

Seller:jmj930

Seller Type:Private Party

Exterior Color:Black Metallic

Interior Color:Black

Overview

1979 Porsche 911 Turbo Coupe – Freshly Porsche Classic Certified, 31k Miles

This striking 1979 Porsche 911 Turbo Coupe (VIN 9309800147), finished in original Black Metallic (A2A2) over black leather, represents the pinnacle of air-cooled performance and style. With just 31,476 miles from new and recently certified by Porsche Classic Partner Jacksonville, this example is accompanied by a full Porsche Classic Technical Certificate issued March 2025. Factory-original engine (#6890126) and transmission (#7790301) remain in place, both visually verified and matched to Porsche's records. The car was produced in October 1978 and delivered new to the United States, making it one of the coveted early-model year 930 Turbos equipped with the larger 3.3L engine and upgraded intercooling system.

The car spent most of it's life with a single owner up until the seller's acquisition in 2023 from the original owner's widow. During it's original period of ownership, the car was refinished in its factory-correct paint-to-sample Black Metallic while an aftermarket intercooler and 6-into-1 exhaust were also installed. Under current ownership and prior to certification, the car was taken to Olsen Motorsports in Naples, Florida for a full mechanical inspection and restoration of any issues. Extensive records document their work, which included a comprehensive rebuild of the suspension system, replacement of all rubber seals, bushings, and grommets due to age-related dry rot, and a complete overhaul of the brake system—replacing lines, rebuilding calipers, installing a new master cylinder, and replacing the brake booster. The engine received a compression check, valve adjustment, full tune-up, and the air conditioning system was repaired. Finally, the entire chassis and engine compartment were meticulously dry ice cleaned, resulting in one of the cleanest undercarriages you’ll find on a 930 Turbo.

The Porsche Classic certificate confirms the car's integrity with a thorough inspection across all systems—engine, drivetrain, suspension, and bodywork—all receiving passing marks. The paintwork and body are rated in excellent condition, with only minimal cosmetic wear, while the mechanicals, including exhaust, brakes, and drivetrain, are reported to be in superb order. Optional factory equipment includes a limited-slip differential, sport seats, electric sunroof, black roofliner, and exterior mirror—providing a desirable and highly original specification. The tires are N-Spec Pirellis on correct 16" wheels, with excellent tread depth and compliant age.

Expert notes acknowledge light wear on brake pads and rotors consistent with low mileage. Accompanied by a complete photo documentation, including underbody and matching serials, this Porsche stands as a benchmark-quality 930 Turbo for collectors and drivers alike. Whether for show, spirited road use, or investment, this example captures the essence of Porsche’s turbocharged legacy with unmatched provenance and originality.

Features & Options

Factory Optional Equipment:

CO2 – US Equipment
261 – Exterior Mirror
469 – Black Roofliner
220 – Limited Slip Differential
409 – Sport Seats – L/R
650 – Electric Sunroof

Vehicle Details:
- 1979 Porsche 911 Turbo Coupe (VIN: 9309800147)
- Original Black Metallic exterior over black leather interior
- Production date: October 1978
- Only 31,476 miles from new
- U.S.-delivered example
Certification & Documentation:
- Porsche Classic Technical Certificate issued March 28, 2025
- Conducted by Porsche Classic Partner Jacksonville
- Matching numbers engine (#6890126) and transmission (#7790301) verified
- Includes full inspection documentation and photo record
Mechanical & Cosmetic Condition:
- 3.3L turbocharged flat-six engine and factory intercooler
- Engine and transmission verified as original to the vehicle
- All major systems passed inspection (engine, suspension, brakes, electrics)
- Paint and body rated in excellent condition with minimal wear
- Interior in very good condition with original materials and trim
- No structural or panel damage noted
Inspection Findings:
- Minor engine “sweating” noted—no action required
- Brake pads and rotors show only minimal wear
- Tires are Pirelli N-spec, date-coded 2019, with ample tread and correct spec
- Spare wheel present; underbody cover not removed during inspection
Additional Highlights:
- Accompanied by detailed inspection photographs
- Car presents as an outstanding example of an early 3.3L 930 Turbo
- Ready for road use, collection, or concours presentation
- A rare opportunity for collectors seeking originality, low mileage, and documentation

Modifications

Aftermarket intercooler
6-into-1 Exhaust

Service Records

Prior to certification, the car underwent comprehensive servicing at Olsen Motorsports in Naples, Florida. All worn or aged components were addressed, including a suspension rebuild, full brake system overhaul, engine tuning, A/C repair, and extensive rubber seal replacement. The work is fully documented with detailed service records and invoices, and the chassis and engine compartment were professionally dry ice cleaned.

Ownership Documents

This stunning 930 comes freshly certified by Porsche Classic Partner Jacksonville, with its official Porsche Classic Technical Certificate issued on March 28, 2025.

Known Shortcomings

Sotheby's Motorsport presents this auction in partnership with the seller. This 1979 Porsche 911 Turbo shows wear consistent with its age and mileage according to a Porsche Classic Technical Certificate. Please review the entire document by clicking "Inspection Report" above.

Items included in the Sale

Factory literature (i.e. an owner's manual)
Service records from current ownership
Service records from previous ownership
Factory certificate of authenticity
2 key fobs

1979 | Porsche 911 Turbo