---
title: Porsche 917/10 (1971) · HICONIUM
description: "Porsche 917/10 (1971). The original naturally aspirated 917/10 — two spyders, one a works test car and one Jo Siffert’s 1971 Can-Am racer."
canonical_url: https://hiconium.com/vehicles/porsche/917/917-10
---

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[Porsche 917 — the model file](https://hiconium.com/vehicles/porsche/917)

# 917/10

1971 · Very rare · 2 built

![Porsche 917/10 — reference](https://hiconium.com/_derived/images/cars/porsche-917/t10-gulf.jpg.w1920.q75.webp)

The execution

The original naturally aspirated 917/10 — two spyders, one a works test car and one Jo Siffert’s 1971 Can-Am racer.

Chassis 001 served as the test car; 002 carried Jo Siffert through the 1971 Can-Am season. Their 5.0-litre flat-12 made about 630 PS without turbocharging, before the later 917/10 TC programme.

On the record

- Two built — 001 the works test car, 002 Siffert’s Can-Am racer
- 5.0L naturally aspirated flat-12, about 630 PS
- 917/10-002 sold for $666,000 in 2000

As separated

Years 1971

Built 2

Engine 5.0L naturally aspirated flat-12

Power ~630 PS

Against the 917 K

Years 1971 · 917 K 1969–1971

Built 2 · 917 K 36

Engine 5.0L naturally aspirated flat-12 · 917 K 4.5–5.0L flat-12 · Type 912

Power ~630 PS · 917 K 580–630 PS

The documents

![The first Can-Am spyder, 917/10-001, in Gulf colours](https://hiconium.com/_derived/images/cars/porsche-917/t10-gulf.jpg.w1920.q75.webp)

![Siffert’s STP 917/10 spyder at speed](https://hiconium.com/_derived/images/cars/porsche-917/docs/91710-stp-sauger.jpg.w1920.q75.webp)

[All 917 executions](https://hiconium.com/vehicles/porsche/917#variants)