BMW, 7 Series, E23, 728i (1979-1986)

General Information

• Production period: 1979-1986
• Body style: Sedan (4-door)
• Length/Width/Height: 523.5 cm / 185.2 cm / 143.3 cm
• Wheelbase: 306.8 cm
• Curb weight: approximately 1,750 kg

Engine and Performance

• Engine: M12 engine, inline-6 cylinder
  • Displacement: 2,778 cc (169.9 cu in)
  • Power output: 136 PS (100 kW; 134 hp) at 5,500 rpm
  • Torque output: 205 Nm (151 lb-ft) at 4,000 rpm
• Transmission:
  • Manual: 4-speed manual transmission
  • Automatic: 3-speed automatic transmission with E24 differential lock
• Performance:
  • Top speed: approximately 200 km/h (124 mph)
  • Acceleration: 0-100 km/h (0-62 mph) in around 10 seconds

Interior and Features

• Interior design: upgraded interior with new dashboard, seats, and trim options for the E23
• Seating capacity: 5 people
• Cargo capacity: approximately 480 liters (17 cu ft)
• Infotainment:
  • Radio: AM/FM radio with cassette player
  • Sound system: optional 4-speaker sound system

Safety Features

• Driver and passenger airbags were not available on the E23, but lap/shoulder belts for driver and front passenger seats were standard equipment
• Anti-lock braking system (ABS) was an optional feature from 1982 onwards

Dimensions and Capacity

• Length: 523.5 cm (206 in)
• Width: 185.2 cm (73 in)
• Height: 143.3 cm (56.4 in)
• Wheelbase: 306.8 cm (120.7 in)
• Curb weight: approximately 1,750 kg (3,853 lb)

Trim and Options

• Trim levels:
  • L
  • S
  • LS
  • LS with leather seats
• Optional features:
  • Sport package
  • Leather upholstery
  • Sunroof
  • Rear window sunshade

Fuel Economy

• Average fuel economy (depending on conditions):
  • Manual transmission: 10.2-12.6 L/100 km (23.5-18.9 mpg)
  • Automatic transmission: 11.3-13.8 L/100 km (20.5-16.7 mpg)

Production Numbers

• Total production for the E23:
  • 728i: approximately 53,511 units
  • Other models and trims combined: around 61,555 units

Warranty and Maintenance

• Warranty period: standard warranty of 2 years/40,000 km (24,859 mi)
• Maintenance costs and recommendations varied depending on conditions