Positioning:
The Ferrari 328 GTB represented a significant evolution of Ferrari's V8 mid-engined sports car lineage, offering improved performance, handling, and refinement over its predecessor, the 308. It occupied a desirable niche in the exotic sports car market.
Competitors:
Competed against iconic models such as the Porsche 911 (930/964 generation), Lamborghini Jalpa, and Aston Martin V8 Vantage during its production run.
Design Philosophy:
Combines Pininfarina's timeless styling with Ferrari's performance engineering, emphasizing driver engagement and aerodynamic efficiency. The GTB variant features a Berlinetta (fixed-head coupe) body style.
Manual Benefit:
Provides essential technical knowledge for owners and independent specialists to maintain and repair this classic Ferrari, preserving its performance and value.
General Coverage:
Comprehensive service, maintenance, and repair for Ferrari 328 GTB
Estimated Pages:
Varies by edition, typically several hundred pages for a full service manual
Type:
Full Service and Repair Manual
Format:
PDF (Digital Download)
Engine:
V8 engine overhaul, tuning, fuel injection, ignition system, cooling, lubrication
Transmission:
Manual gearbox repair, clutch service, differential
Brakes:
Brake system diagnostics, caliper overhaul, fluid replacement, ABS (if applicable)
Suspension Steering:
Front and rear suspension components, steering rack, alignment
Electrical System:
Wiring diagrams, ECU diagnosis, lighting, power windows, instrumentation
Bodywork Chassis:
Body panel repair, chassis lubrication, door mechanisms, glass replacement
Maintenance:
Routine servicing, oil changes, filter replacements, spark plug intervals
Troubleshooting:
Diagnostic charts, fault finding for common issues
Repair Rebuild:
Step-by-step instructions for major component overhauls and repairs
Adjustments:
Valve adjustments, ignition timing, fuel mixture settings
Depth:
Comprehensive; covers basic maintenance to complete engine and transmission rebuilds, including electrical system diagnosis.
Engine Configuration:
90-degree V8, mid-mounted, longitudinal
Displacement:
3185 cc (3.2 Liters)
Bore X Stroke:
81.0 mm x 78.0 mm
Valvetrain:
DOHC, 4 valves per cylinder (32 valves total)
Horsepower:
270 hp (201 kW) @ 6300 rpm (European/US spec)
Torque:
230 lb-ft (312 Nm) @ 4500 rpm (European/US spec)
Fuel Delivery:
Bosch K-Jetronic mechanical fuel injection
Fuel Type:
Unleaded Gasoline
Cooling System:
Water-cooled, pressurized system with electric fan
Oil Capacity:
Approx. 9.5 liters (10 US quarts) with filter
Type:
5-speed Manual Transaxle
Gear Ratios:
Refer to manual for specific ratios (e.g., 1st: ~3.23:1, 5th: ~0.80:1)
Differential:
Limited-slip differential (LSD)
Transmission Fluid:
Refer to manual for specific GL-4 or GL-5 gear oil specification (e.g., SAE 75W-90 or 80W-90)
Crash Test Data:
No formal crash test data typically available for vehicles of this era and market segment.
Braking System:
4-wheel disc brakes, ventilated front and rear.
ABS:
Bosch ABS (Anti-lock Braking System) was optional on later models, standard on some later production units.
Seatbelts:
3-point inertia reel seatbelts
Construction:
Steel monocoque chassis with aluminum body panels and front/rear subframes.
Audio System:
Typically features an aftermarket or original period-correct AM/FM/Cassette player. Advanced infotainment was not standard.
ABS:
Optional on earlier models, becoming more common on later production 328s.
Connectivity Features:
None from the factory. Connectivity in the modern sense was not a feature.
Dashboard Layout:
Classic Ferrari VDO instrument cluster with tachometer, speedometer, fuel, oil pressure, and coolant temperature gauges.
Oil Change Interval:
Every 5,000 km (3,000 miles) or annually, whichever comes first. Refer to manual for precise interval and conditions.
Timing Belt Replacement:
Every 24,000 km (15,000 miles) or 2 years, whichever comes first. Critical for V8 Ferrari engines to prevent catastrophic damage.
Spark Plug Replacement:
Refer to manual, typically at major service intervals.
Engine Oil:
Refer to manual for specific API rating and viscosity (e.g., SAE 20W-50 or 10W-40 synthetic).
Coolant:
Ethylene glycol-based antifreeze with corrosion inhibitors (e.g., 50/50 mix with distilled water).
Brake Fluid:
DOT 3 or DOT 4 high-temperature brake fluid.
Common Problems:
Fuel line degradation, aging rubber hoses and seals, ignition system component failure, clutch wear, cam belt tensioner issues, and potential sticky fuel distributor issues with the K-Jetronic system. Regular maintenance is crucial.
Key Checks:
Regular inspection of belts, hoses, ignition wires, suspension bushings, and the K-Jetronic fuel system for leaks or performance degradation.
Heritage:
Ferrari has a legendary history in motorsport and road-going sports cars, epitomizing performance, design, and exclusivity.
Predecessor:
Ferrari 308 GTB/GTS
Key Enhancements Over 308:
Increased engine displacement, improved torque, updated fuel injection (from Weber carburetors), revised suspension geometry, and minor styling updates including body-colored bumpers and new wheel designs.
Production Years:
1985-1989
Production Numbers:
Approximately 2,700 GTB models produced out of over 7,000 total 328 variants (including GTS).
Manufacturing Location:
Maranello, Italy
Automotive Critics:
Praised by automotive journalists of its time for its balanced handling, potent V8 engine, and iconic styling. Often cited as a more approachable and reliable Ferrari than some of its predecessors.
Collectible Status:
Considered a highly desirable and collectible modern classic Ferrari, appreciating in value among enthusiasts.
