Question: 1987 Buick Grand National Gnx Horsepower?

How much horsepower does a GNX have?

Schorr in his book, Buick GNX. With a new two-piece aluminum intake manifold that increased airflow by 10 percent, the engine was rated at 235 horsepower and 330 lb-ft of torque for ’86, then 245 horsepower and 355 lb-ft for ’87.

How much horsepower does a 1987 Grand National have?

The GNX’s 3.8-liter V-6 developed 276 horsepower at 4400 rpm, and 360 pound-feet of torque at just 2400 rpm, courtesy of an uprated Garrett ceramic vane turbocharger and recalibrated engine-management system.

What is the difference between a 1987 Buick Grand National and a GNX?

Off the dyno the GNX engine is up 55 bhp from the standard Grand National’s rating to 300 at 4400, while torque climbs from 355 to 420 at 2400 rpm. Buick had already reached the limits of the Regal’s suspension with the Grand National, so the GNX is beefed up still more.

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What is the difference between Grand National and GNX?

Buick GNX Specs – Interior Modifications

The GNX has all the interior features of a fully loaded Grand National, except for T-tops or a sunroof/moonroof (to increase structural integrity), although some customers may have opted to have a sunroof or T-tops retrofitted.

What is the rarest Buick Grand National?

With only 215 examples produced, the 1982 Grand National is the rarest of all Buick Regal Grand National models. 2) Also released in 1982 alongside the Buick Grand National package was the even rarer 1982 Buick LeSabre Grand National, with only 112 examples produced.

How much is a 1987 Buick GNX worth?

1987 Buick GNX could reach monetary digits not seen before. With four days still left on the Bring a Trailer auction, the GNX is already up to $100,000. The Grand National, particularly the GNX, is one of those cars that has skyrocketed in value in the past 10 years.

What was the fastest American car in 1987?

Back in 1987 the fastest U.S. production car ever to be produced was the Buick Grand National/GNX.

What year is the best Buick Grand National?

By 1987, the darling year for the Buick Grand National, the engine made 245 hp and 355 lb-ft of torque.

What does Buick GNX stand for?

GNX stands forGrand National Experimental” and only 547 were produced.

How fast was the Buick GNX?


0 – 100 kph 4.7 s
0 – 100 mph 12.9 s
Est. 1/8 mile 9.0 s @ 88.2 mph
1/4 mile 13.4 s
Top speed 200 kph (124 mph)
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How many Buick GNX are left?

Time has been kind to GNX and Grand National values. Multiple cars have reportedly sold for six figures, and we’re about to see this one, production no. 480, reach that mark as well. It certainly helps that only 547 GNXs exist.

How do you know if a Grand National is real?

Compare the vin on the trunk rpo label to the actual vin. Last but not least their is a paint code tag below the vin on the firewall. If its 14 it was a factory black regal. It wont tell 100% if it’s a real GN but it will point out a clone since there was very few black TR’s.

How much boost can a stock Grand National handle?

Limited by fuel

A stock 86-87 engine ran 13-14 pounds of boost with 93-94 octane available in the late 80’s. At stock boost and 91 octane, you’re limited to about that much boost. Put the fuel in that you wish to run, and monitor the knock retard with a scan tool. If it knocks, turn the boost down.

What is the top speed of a Buick Grand National?

124 mph may be the fastest back then. Unless you were driving something exotic – the fastest cars in the late 80s would be slow cars today. Among car enthusiasts and reviewers, “fastest” usually means top speed, and “quickest” means 0-60.

Did Grand Nationals have T tops?

The car also comes equipped with factory TTops, a rare and desirable option on a 1987 Grand National. The glass and seals are in excellent condition and there are no leaks evident.

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