The two super funds were joined by an unnamed third investor in a AU$110 million investment into the junior debt of Alpha Trains.
The transaction, led by Whitehelm Capital, represents 64 per cent of the total junior debt of the company.
Alpha Trains is the largest private rolling stock lessor in the passenger and freight markets in Continental Europe, according to a statement by Whitehelm.
Whitehelm head of infrastructure debt Alexander Waller said that while infrastructure transactions for "large trophy assets" have been aggressively bid, junior debt remains "attractively priced".
"This transaction demonstrates that there are still compelling infrastructure investments in the market for investors willing and able to consider relative value across the capital structure carefully," Mr Waller said.
"It also underlines the substantial capital available from our Australian clients for attractive debt opportunities that support high-quality borrowers in the infrastructure sector.
"In uncertain markets, and in the face of spiraling valuation multiples, investments like this provide both premium returns and defensive characteristics, while carrying attractively short duration," Mr Waller said.
