What engine is in a 1991 MR2?

The engine in a 1991 MR2 depended on the model and market: the original AW11 used a 1.6-liter naturally aspirated four, while the newer SW20 introduced a turbocharged 2.0-liter four for the MR2 Turbo. In short, two distinct powerplants were in play for that year.

Two generations, two distinct powerplants

In 1991, Toyota’s MR2 lineup covered both the first-generation AW11 and the second-generation SW20. Each generation used a different engine philosophy to balance lightness and handling with performance, depending on the model and market.

First generation AW11 (1984–1989; continued in some markets into the early 1990s)

Engine profile for the AW11, the original MR2 that established the mid‑engine, rear‑wheel‑drive formula.

• Engine code and displacement: 1.6 L (1587 cc) inline-4, 4A-GE


• Valvetrain: Dual overhead camshafts, 16 valves


• Aspiration: Naturally aspirated


• Power output: Approximately 112–130 horsepower, depending on market and year


• Common transmissions: 5-speed manual was standard; some markets offered a 4-speed automatic

In short, the AW11’s 1.6-liter 4A-GE NA engine gave the early MR2 its light, balanced character with a focus on handling rather than outright speed.

Second generation SW20 (1990–1999)

Engine profile for the SW20, which brought a larger, more performance-oriented MR2, including the turbocharged variant.

• Engine code and displacement: 2.0 L (1998 cc) inline-4, 3S-GTE


• Valvetrain: DOHC, 16 valves, with turbocharged induction


• Aspiration: Turbocharged (intercooled)


• Power output: Roughly 200 horsepower in early US-specs; higher outputs (~225–240 hp) in certain markets or later revisions


• Common transmissions: 5-speed manual was standard; 4-speed automatic was available in some markets

The SW20 Turbo variant delivered a significant performance boost, reflecting Toyota’s shift toward a more powerful, turbocharged road presence in the MR2 line.

Summary

For a 1991 MR2, the engine options fall into two categories: the first-generation AW11 with a 1.6-liter naturally aspirated 4A-GE, and the second-generation SW20 with a turbocharged 2.0-liter 3S-GTE for the MR2 Turbo. The choice hinges on the model and market, representing the MR2’s evolution from a light, handling-focused coupe to a more performance-oriented, turbocharged sports car.

What engine is in the 1991 MR2?

3S-GTE 2.0-liter four
For its high-sport engine option, the new MR2 borrows the lusty turbocharged and intercooled 3S-GTE 2.0-liter four developed for the Celica All-Trac. In 1991 trim, this twin-cam, sixteen-valve engine produces 200 hp at 6000 rpm and 200 pound-feet of torque at 3200.

What engine does a MR2 have?

The Toyota MR2 has had several different engines across its generations, with the most common being the naturally aspirated 1.6L 4A-GE, the 2.2L 5S-FE, the 2.0L 3S-GE, the 2.0L turbocharged 3S-GTE, and the 1.8L 1ZZ-FED. Engine choice depended on the specific model year and market, with higher-performance versions often featuring the 3S-GTE turbo or other variations.
 
Examples of MR2 engines by generation and market

• First Generation (AW11):
  • Base Model: 1.6L 4A-GE, a naturally aspirated inline-four 
  • Supercharged Model: Supercharged 4A-GE with more horsepower 
• Second Generation (SW20):
  • Non-Turbo (North America): 2.2L 5S-FE inline-four 
  • Non-Turbo (Europe/Asia): 2.0L 3S-GE inline-four 
  • Turbo (Worldwide): 2.0L 3S-GTE inline-four 
• Third Generation (W30/MR-S):
  • Standard Engine: 1.8L 1ZZ-FE with VVT-i 

How much is a 1991 MR2 worth?

The value of a 1991 Toyota MR2 Mk II can vary greatly depending on its condition, mileage, options, and history. Typically, you can expect to pay around $16,800 for a 1991 Toyota MR2 Mk II in good condition with average spec.

Is the 1991 MR2 reliable?

The 1991 Toyota MR2 is a reliable car, but like any 30-year-old vehicle, its reliability depends heavily on its maintenance history and current condition. They are known for their durable powertrains that can last for hundreds of thousands of miles, though wear-and-tear items like hoses, belts, and seals will need regular attention. Common issues to inspect for are rust and leaky t-tops, which can lead to more significant problems if not addressed. 
This video explains common problems and what to look for when buying a used MR2: 12sReDrivenYouTube · Dec 3, 2023
Strengths

• Durable Engine: The MR2's engines are robust and capable of reaching high mileage with proper care. 
• Strong Toyota Reputation: Toyota is synonymous with reliability, and the MR2 is no exception in terms of its core mechanical components. 
• Fun to Drive: Beyond reliability, the car offers a great driving experience that has earned it a cult following. 

Potential weaknesses and things to inspect 

• Rust: Rust is a major concern for cars of this age, especially in areas exposed to salt. Check the wheel arches, undercarriage, and areas around seals thoroughly. 
• T-Top Leaks: T-top models are prone to leaks, which can cause water damage, mold, and rust. Inspect the seals and look for any signs of water intrusion. 
• Owner-Inflicted Issues: Many cars have been abused, poorly modified, or neglected. Look for a clean, well-maintained example, as it will be less likely to have hidden problems. 
• Parts Availability: Finding replacement parts can be challenging and may require patience, as some are discontinued or require special ordering. 
• Age-Related Wear: Expect to find common age-related issues like dry-rotted rubber components (hoses, belts), minor electrical glitches (window motors, door actuators), and wear on interior parts. 

This video provides a comprehensive review and guide on what to look for when buying a 1991-1995 Toyota MR2: 59sMiguel's GarageYouTube · Mar 9, 2023
Recommendations for prospective buyers

• Be Patient: Finding a well-maintained MR2 takes time and patience. Be prepared to look at several cars before finding a good one. 
• Thoroughly Inspect: Conduct a detailed inspection, focusing on rust, t-top seals, and any signs of poor repairs or modifications. 
• Get a Pre-Purchase Inspection: It is highly recommended to have a mechanic inspect the car before you buy it.
• Have a Backup Car: Due to potential downtime for repairs, it's wise to have a reliable backup car, especially if you plan to make the MR2 your daily driver.