The Innocenti Mini 1001 is often overlooked but provides a compelling option for enthusiasts looking to enjoy Cooper-like performance on a budget. Built on the same solid foundation as the Mini Cooper 998, the 1001 offers near-identical hardware and is a fantastic platform for classic Mini enthusiasts.

Innocenti Mini 1001 vs. Mini Cooper 998: Almost Twins?

What if there were a cost-effective alternative to the iconic Mini Cooper 998 that shares nearly the same engine but comes at a fraction of the price? Enter the Innocenti Mini 1001—an underrated classic offering similar performance potential and engineering as the real Coopers.

Key Similarities Between the Models

Despite originating from slightly different eras, the Innocenti 1001 (1972–1975) and Mini Cooper 998 (1964–1971) share a remarkably similar engineering DNA. Both models include:

• 998cc engine block
• Legendary 12G295 cylinder head, also referred to as the 28G222 in production manuals
• D-topped pistons, providing a 9.0:1 compression ratio
• Crankshaft 8G2733 (forging number 12A595)
• 3.44:1 final drive, balancing acceleration and drivability
• AEA 630 camshaft, also found in 1098cc models

Distinctions in Intake, Exhaust, and Carburation

While the Innocenti 1001 and Mini Cooper 998 share the same engine block, cylinder head, and camshaft, key differences lie in the intake, exhaust, and carburation systems:

• Mini Cooper 998: Featured an all-aluminium intake manifold, twin HS2 carburetors, and a larger bore exhaust system, maximizing performance.
• Innocenti 1001: Used a combined 2-in-1 intake and exhaust manifold (as found on base models like the Mini 850) and a single HS4 carburetor, resulting in lower airflow and reduced horsepower.

So we can and Should upgrade the Innocenti?

Absolutely! The Innocenti 1001 shares nearly every critical component with the Mini Cooper 998, making it a strong foundation for performance tuning. By installing a Stage 1 kit and modifying the carb or upgrading to twin carbs, you can easily match the performance of the Cooper. Take it a step further with a camshaft upgrade and additional tuning, and the 1001 can surpass the Cooper’s capabilities. For enthusiasts on a budget, the 1001 provides unbeatable potential and there’s even room for improvement!

Performance Upgrade Pathways

Here’s how to unlock the Innocenti 1001’s and your Cooper 998 full potential:

Stage 1 Kit
Install an all-aluminium intake manifold and larger bore exhaust, mirroring the Mini Cooper 998 setup.

Camshaft Upgrades
Although the original AEA 630 camshaft performs very well (same profile as AEG148), replacing it  could gain performace in different areas. An SW5 will improve low end torque, the Kent 266 can provide better performance higher in revs but with a slightly lumpy idle and the 276 cams are ideal for the one’s seeking for high-reving performance.

Carburetor Tuning
Tune the single HS4, Upgrade to a twin HS2 carburettor or consider a HIF38 for maximum performance boost.

High-Lift Rockers
Upgraded rockers with a 1.3 ratio are ideal for a 998cc engine. Anything higher, like a 1.5 ratio, would result in a peaky engine with reduced low-end horsepower, which is undesirable. Upgraded rockers with a 1.3 ratio represent a significant improvement from the standard 1.2 to 1.25 ratio.

Final Thought

The Innocenti Mini 1001 isn’t just a budget alternative; it’s a solid base for enthusiasts. A Stage 1 kit is a must to bring out its potential. For camshaft options, the Swiftune SW5 with 1.3 ratio rockers is ideal for road use, delivering smooth idle and good low-to-mid range power. The Kent 266 offers stronger high-end performance but idles rougher and the 276 is another step up.

All carburetors can work, but a HIF38 is the most reliable for consistent power and tuning. With a Stage 1 kit, camshaft upgrade, and 1.3 rockers, hitting 60 hp or more is achievable and can outperform the original Cooper 998.