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Superior XP-320 Engine

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Product Description

Superior XP-320 Aircraft Engine

Displacement – 320 cubic inches

Max Continuous Brake Horsepower:  160 hp/119 kw standard, 150 hp/112 kw available, 165 hp/123kw available

Compression ratio:  8.5:1 standard, 7:1 and 9:1 available

Oil Capacity:  8.0 Qt. Max/2.5 Qt. Min (7.6 Ltr. Max/2.4 Ltr. Min.)

Ignition:  Dual impulse magnetos standard

Engine Mount Type:  Conical

Propeller Drive:  Direct AS172 Type 2 Modified

Propeller Type:  Fixed Pitch


O-320 – 276 pounds (125 kg)**

IO-320 – 283 lbs (128 kg)**

Fuel Types:  100 LL Avgas or 91 octane automotive gasoline*


  • fuel pump
  • fuel system
  • magnetos
  • harness
  • spark plugs
  • lightweight starter
  • oil filter adapter
  • oil filter and updraft cast sump

*NOTE:  Superior XP-320 Engines are approved for 100LL Avgas per ASTM D9910, 91/98 (lead optional) and motor gasoline with a minimum antiknock index (R=M/2 method of 91 per ASTM D4814 (European EN228).  Use of auto fuel blended with alcohol (ethanol) is forbidden.

**Approximate dry weight.  Actual weight varies by model.

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