VTI Engine Package – 2000 Nord – Full 2050 cc Conversion +55BHP

Description

Developed in collaboration with VTI Engineering and top Italian manufacturers

This high-performance bottom-end kit has been designed to strengthen and enhance the Alfa Romeo 2000 twin cam (Nord) engine. Combining forged pistons, precision-engineered liners, high-grade bearings, IWIS timing chains, and Reinz gaskets, it provides the durability and performance headroom required for fast-road, track-day, and full competition builds.

Engineering Basis

• Engine base: Alfa Romeo 2000 Nord (original bore × stroke: 84 × 88.5 mm, displacement 1,962 cc).
• Bore options:
  • 84 mm (standard) → 1,962 cc
  • 85 mm → 2,009 cc
  • 85.5 mm → 2,033 cc
• Compression ratio options:
  • 10.5:1 – compatible with 91–93 octane fuel
  • 11.0:1 – optimized for performance with premium fuels
  • 11.5:1 – maximum performance potential with high-octane race fuel
• Geometry considerations:
  • The 2000 is undersquare from the factory.
  • Increasing the bore to 85 and 85.5 mm pushes the design toward square, improving airflow and rpm capability.

Piston and Liner Engineering

• 20% narrower intake skirt reduces friction and improves throttle response.
• Controlled compression decay after TDC optimizes gas exchange and combustion efficiency.
• 40% reduction in exhaust skirt load increases durability under high load.

Kit Contents

• Forged pistons with conventional rings, pins, and wire locks.
• Precision-engineered liners.
• High-Performance Connecting Rods
• Reinz head gasket and full engine gasket set.
• Standard rod and main bearings (oversize options available).
• IWIS race/road timing chains (top and bottom).
• Thrust washers, lock tabs, and complete hardware kit.
• Camshafts
• Intake and Exhaust Valves
• Valves Guides
• Valves Springs
• Timing Pulley
• Full Gasket Kit
• Carburettors Mounting
• Sport Sparks
• Sport Flywheel
• Sport Horns
• Valves Seals

Performance Potential

Stock Baseline (84 mm bore, 9.0:1 CR, SPICA or carbs)

• ~130–135 hp @ 5,500–5,800 rpm
• Usable rpm range: up to ~6,200 rpm

With Kit – 84 mm bore (1,962 cc), 10.5–11.5:1 CR

• Fast-road build: 145–155 hp @ ~6,500 rpm
• Race build: 160–170 hp @ ~7,000 rpm
• RPM ceiling: ~7,000 rpm

With Kit – 85 mm bore (2,009 cc), 10.5–11.5:1 CR

• Fast-road build: 150–160 hp
• Race build: 165–175 hp
• RPM ceiling: ~7,200 rpm
• Advantage: displacement increase and improved bore/stroke ratio → stronger mid-range torque and improved breathing

With Kit – 85.5 mm bore (2,033 cc), 10.5–11.5:1 CR

• Fast-road build: 152–162 hp
• Race build: 174–180 hp
• RPM ceiling: ~7,500–7,700 rpm
• Advantage: near-square geometry improves valve area and combustion, extending top-end power while retaining strong torque

Figures assume sport/race camshafts, 45–48 DCOE carburetors, ported cylinder head, and a tuned stainless-steel 4-2-1 exhaust. Properly designed headers typically add +10 hp.

Contact us if you need a head job.

Advantages of Approaching Square Geometry

• Higher rpm capability: reduced piston speeds make higher rev limits safe.
• Improved breathing: larger bore allows increased valve size and better airflow.
• Balanced character: retains the 2000’s natural torque while enhancing top-end output.
• Combustion efficiency: optimized chamber proportions improve stability and power at high speed.

Summary

This bottom-end kit transforms the Alfa Romeo 2000 Nord into a reliable, tunable platform for both road and motorsport. With bore enlargement up to 85.5 mm and compression ratios up to 11.5:1, the engine can be developed from its stock ~135 hp to a 150–160 hp fast-road specification or up to 175+ hp in race trim.

Approaching a square bore/stroke ratio improves airflow and rpm stability, while forged pistons, precision liners, IWIS chains, and high-grade bearings ensure long-term reliability. This is the ultimate bottom-end solution for builders and drivers looking to maximize the performance of the Alfa Romeo 2000 twin cam.

Excellent — here is a comprehensive comparison chart covering the 1300, 1600, 1750, and 2000 Alfa Romeo Twin Cam engines, with all bore options, displacements, compression ratio ranges, expected horsepower, rpm ceilings, and notes on geometry. This will let your customers compare upgrade paths at a glance.

Here’s the updated comparison chart with all four classic Alfa Romeo Twin Cam engines (1300, 1600, 1750 Nord, 2000 Nord) plus the 2000 Twin Spark, including bore options, displacement, compression ratio ranges, estimated horsepower, rpm ceilings, and geometry notes.