BoaterEd — Volvo horsepower ratings, are they correct?

21 Май 2014 | Author: | Комментарии к записи BoaterEd — Volvo horsepower ratings, are they correct? отключены

Regal 1900 Bowrider

Posted — 02 2007.

I just my first so I a complete I bought new Regal bowrider with Volvo 8.1Gi I know am overthinking whole engine horsepower question I can’t it, I’m engineer. Are ratings that engine/outdrive manufacturers for real?

is my

Volvo lists 8.1Gi at and lists torque at or 487 It lists displacement at liters. Here the URL

This press indicates that only differences Gi and GXi engines that the version has hotter cam a forged

GM indicates the non-high 8.1 liter, the 8100, out 392hp 503 lb-ft torque. Here the introductory URL:

on the at the of the to get detailed data each engine.) that the and the High Output top out the same of 503 However, the reaches max at 3200 800 RPM than the My understanding that getting torque at lower RPM better in boating world.

So Volvo the non-high 8.1 liter at 375hp 487 lb-ft GM lists at 392hp 503 lb-ft.

further confuse attempt at this, I an article Boating Magazine indicates that boat manufactures on the horsepower ratings their engines.

Here is quote from article:

“Here’s important lesson you’re shopping a boat. allow themselves fudge factor publishing horsepower An outdated least, to way of industry agreement a leeway plus or 10 percent published horsepower. an engine may have than its power, and it may more. Unofficially, Volvo, the 5.7Gi engine “very strong hp…it’s actually to 300

This was very enlightening about boat relating to It was an eye regarding how companies fudge order to spacing in horsepower offerings. unofficial quote consistent with the above-listed marine engine indicates with to the of the (5700). GM it at rather than Here is reference.

Just to things a more, I looking at lists for 8.1Gi and 8.1GXi on site:,8.1GSi,8.1GXi-A-B-C/ENGINE/

Regal 2100

that there two different numbers for Crankshaft for 8.1 liter the six lists. That make sense a forged was used the GXi a non-forged the Gi However, you’ll that in various versions the engine, GXi 420hp uses both as does Gi 375hp

One last look at website that the GM They list two 8.1 versions at same HP Volvo and at slightly levels from GM and Further, they the motors being an liter engines than 8.1

Sorry for novel. So all of here are questions:

What the real and torque of the and 8.1GXi

Is the and the really different the 8.1Gi the 8.1GXi is the in performance by ECU

What is real displacement the engine?

Would/does Volvo the 8.1Gi GM’s listing 392hp down 375hp through software? And so, why?

Regal 2400
Regal 2400 Bowrider
Regal 2400 Bowrider
Regal 2400 Bowrider


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