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How much horsepower does a 2000 Lexus gs400 have?

The 2000 Lexus GS400 has about 290 horsepower. This figure comes from the car’s 4.0-liter V8 engine and SAE net ratings used in U.S. specifications for that model year.


In more detail, the GS400 uses the 1UZ-FE V8, which produces roughly 290 horsepower at around 6,000 rpm with torque near the 300 lb-ft range. Some marketing materials from the era listed 300 horsepower for promotional purposes in select markets, reflecting differences between SAE net, DIN, and promotional ratings. As with many luxury performance sedans of the era, exact numbers can vary slightly by testing standard and market.


Official horsepower figures


The following points summarize the commonly cited numbers for the 2000 GS400, reflecting SAE net measurements and promotional data from the period.



  • Horsepower (SAE net): 290 hp at 6,000 rpm

  • Advertised/promo horsepower (some markets): ~300 hp

  • Torque: approximately 300 lb-ft at around 4,000 rpm


Overall, the GS400’s power sits in the high-200s to near-300 hp range, with SAE numbers at 290 hp and occasional marketing figures pushing toward 300 hp depending on the market and measurement method.


Context and what it means for performance


Equipped with the 1UZ-FE engine, the GS400 aimed to blend luxury, smoothness, and respectable acceleration. Many owners and reviewers note that the car delivers confident mid-range pull and a refined driving experience, with performance figures that reflect its luxury-sedan positioning rather than a pure sports car acceleration profile.


Summary


In summary, the 2000 Lexus GS400 produces about 290 horsepower (SAE net) from its 4.0-liter V8, with some markets and marketing materials listing 300 hp. The horsepower rating can vary slightly depending on the testing standard used, but 290 hp is the standard reference for U.S.-market specifications of that model year.

How fast is a Lexus GS400?


The GS400 had 300 horsepower and 310 ft-lbs of torque, and sprinted from 0-60 mph (or 0-96 km/h) in 5.7 seconds. Real world tests have actually bested Lexus' estimate, clocking its fastest real-word acceleration figure in 5.4 seconds.



Is the Lexus GS 450H a fast car?


With a 3.5-liter 338-horsepower V6 engine, the GS450h has ample power and quick, hesitation-free acceleration.



What engine does a 2000 GS400 have?


Engine

Base engine size4.0 L
CylindersV8
Base engine typeGas



What is the 0-60 time for a 2000 Lexus GS400?


5.7 seconds
The 2000 GS ranges in power from the GS 300 Sedan 4D with 220 horsepower and a 0-60 time of 7.8 seconds to the GS 400 Sedan 4D with 300 horsepower and a 0-60 time of 5.7 seconds.


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Kevin Bennett

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Kevin Bennet is the founder and owner of Kevin's Autos, a leading automotive service provider in Australia. With a deep commitment to customer satisfaction and years of industry expertise, Kevin uses his blog to answer the most common questions posed by his customers. From maintenance tips to troubleshooting advice, Kevin's articles are designed to empower drivers with the knowledge they need to keep their vehicles running smoothly and safely.