1978-1982 Porsche 928

Overview

The 928S refined the original 928 through enhanced engine displacement and revised fuel injection mapping, introducing a 4.7-liter V8 producing 234 horsepower in American specification. Produced from 1983 through 1986, this variant elevated the performance positioning relative to the base model while maintaining the grand touring character. The displacement increase from 4.5 to 4.7 liters provided additional power and improved mid-range responsiveness.

The S designation signified enhanced performance, attracting buyers seeking meaningful capability elevation. The 4.7-liter displacement represented a 200-cubic-centimeter increase, providing additional horsepower and torque for improved acceleration responsiveness. The engine maintained the naturally aspirated philosophy of the base model.

Engineering & Development

The 4.7-liter V8 features an aluminum block with cast iron cylinder liners, employing variable valve timing and port fuel injection. The engine produces 234 horsepower at 5,500 rpm, with peak torque available across a broad operating range. The compression ratio optimization enables responsive power delivery without requiring premium-grade gasoline.

The transmission employs a three-speed automatic unit with torque converter lock-up and refined shift programming optimized for V8 torque delivery. The suspension maintains independent double-wishbone front and multi-link rear configuration with revised spring rates reflecting the additional engine output. The steering system provides responsive feedback through improved hydraulic characteristics.

The braking system specifies larger ventilated rotors and enhanced friction material formulations, providing increased stopping power. The cooling system receives enhanced radiator capacity managing thermal loads from the 4.7-liter displacement.

Market Variants

The 928S represents the enhanced variant, featuring sport-oriented suspension tuning and revised interior appointments. The leather upholstery serves as optional equipment with premium stitching details. The sport exhaust provides modest sound enhancement. The optional air conditioning improves practical daily usability.

The wheel specification measures 16 inches as standard, fitted with all-season or optional performance tires. The interior emphasizes refined design and comfortable ergonomics.

Significance

The 928S demonstrates Porsche's commitment to evolutionary refinement of the front-engine grand touring platform. The 4.7-liter displacement proves that modest displacement increases deliver meaningful performance enhancement. The model's commercial success validates continued 928 development and variant introduction.

The 928S proved that naturally aspirated engines deliver satisfying power delivery in grand touring applications.