My Car Quest

December 3, 2023

Iso Grifo No. 413 Is A Very Unusual Price Record Holder

by Mike –

Iso Grifo No. 413 just sold for $440,000 (including buyers commission) at the RM auction in Amelia Island, which I believe is a world record price for a Grifo sold at public auction. I have said many times before that this is a very beautiful Grifo and the non-original design features are outstanding.

What RM said and what they didn’t say in their catalog description is interesting and important.

This same car was sold by RM in 2003 for $83,600 and was then labeled by RM as a “1967 Iso Grifo 7 Liter Prototype”.

Iso Grifo 7 Liter

Iso Grifo No. 413 at The Quail, 2012

What RM said

RM labeled it a “1974 Iso Grifo 7-Liter” this time around in Amelia Island. This car is not a 7-Liter Prototype and is not a 7-Liter model. This car was built in 1977-78 and RM said it is titled as a 1967.

It has a 7-Liter engine (Chevy 427) but that does not make it a 7-Liter model which was an Iso model designation. Only 65 7-Liter Grifos were made and this is not one of them.

The RM description calls the hood “a more traditional hood with a lower scoop”. This is not accurate – this is an Iso Rivolta GT style hood scoop. No Grifo ever left the Iso factory with this hood scoop so it is not at all “traditional”.

What RM did not say

They did not say that this Grifo originally had a Ford 351 engine, that it was originally a series 2 Grifo with the partially covered headlights, it was originally black with tan interior and that it had the pagoda style hood scoop.

They also did not explain why the chassis number was changed from 413 to 223 and the model year was defined as 1967 – which is several years before any part of this car existed.

This photo below of Iso Grifo No. 413 was published in 1983 in the “Griffon”, the publication of the Iso & Bizzarrini Owner’s Club, in issue Volume 3, No. 2 & 3.

Iso Grifo 7 Liter No. 413

Iso Grifo No. 413 as original, 1983

Winston Goodfellow explains in the “Griffon”,

One Grifo was constructed after the factory closed by Ennazeta, a firm comprised of several factory employees who acquired parts inventory upon liquidation of the company’s assets.

This Iso Grifo was black with tan interior and had these features: Ford 351 engine, 5-speed transmission, recessed black rubber front bumper, reworked trunk (spare to one side) which allowed access via a flip down door between it and the rear deck and a different dash board design.

Compare this old photo above to the way the car looks today below after a Salvatore Diomante restoration and remodeling. The front end was changed from the series 2 partially covered headlights to the series 1 uncovered headlights and the hood is a totally custom design along with many other custom features.

Recently there appeared a Grifo for sale in Europe claiming the chassis No. 223. The photos of the chassis stamp did not look quite right, so I am not sure if this is really Grifo No. 223 or not. But somewhere there is (or was) an Iso Grifo that left the factory with chassis No. 223 and it is not this Grifo discussed here.

Iso Grifo for sale

Iso Grifo No. 413 at The Quail, 2012

Why is an Iso Grifo that is not original in nearly every respect the world price record holder for the model?

More to come on this subject.

A brief history of Grifo No. 413 was published here.

Let us know what you think in the Comments.

Iso Grifo logo

Iso Grifo No. 413 Is A Very Unusual Price Record Holder
Article Name
Iso Grifo No. 413 Is A Very Unusual Price Record Holder
Iso Grifo No. 413 set a world record price at the RM auction in Amelia Island recently.


  1. This shows what strong marketing can achieve. RM did a great job getting the word out on this car and they were able to fill the room with bidders. On the other side of the coin Gooding did a nice write up on Grifo 410 the blue series two Grifo, but it was entered to late in the game for it to get the traction it needed. Ironically 410 was the most original out of the two. IMO the owner of 410 (a dealer) would have been better off waiting for the auctions in SoCal or Monterey. Now the dealer is going to have to figure out how to bring this car back to the market after being a no sale. Bottom line Grifo’s are still strong, it shouldn’t be that hard.

    • It will be extra easy for the seller of No. 410 if they put the Rivolta GT hood scoop on and install a 6-speed transmission instead of the auto. Then it is a $350K to $450K Grifo!

  2. IsoBizzaGrifo says

    Well it seems that the story about 223/413 being an unfinished car was just that; as 413 was completed almost the same as 410 except for the five speed.
    I think MikeC is correct about 410 being a late entry and did not have the extensive promotion that RM conducted for 413 which started back in November 2013 regarding their sale at Amelia.
    Plus having 2 Grifo’s for sale at the same show must have reduced the number of bidders between them.
    Personally, I thought that 410 had at least four thing going against it at Goodings sale on a Friday night.

    One. The high pre-auction estimate of 300k-400k; no S2 Ford has come close to that pricing.
    Two. The automatic transmission, as manual trans have been the most sought after.
    Three. Ford vs Chevy, as Chevy is the overwhelming choice of collectors. And Four, the original Baby Blue interior of 410’s. Very polarizing, either you loved it or hated it.
    However…………………… I spoke with a friend who is a major car customs broker and noted car collector( he has owned both a Grifo and a Bizzarrini) who attended both Goodings and RM’s sale at Amelia, and was surprise as all of us as to the outcome of both Grifo’s sale. He spent some time querying the rooms and he said hand down, no one wanted a automatic period. Not the Ford, not the penthouse hood, not the blue interior; hence the limited bidding for 410 and the bidding war for 413.

    I think MikeG is on to something regarding swapping out tranny’s /and or hoods to “make” a $400k + Grifo.

    Originality is in the eye of the beholder.

    PS Anyone know of a Richman 6 speed and some 7 L emblems for sale?

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