Exhibit 4.1

NUMBER

U-[●]

UNITS

TIMBER ROAD ACQUISITION CORP.
INCORPORATED UNDER THE LAWS OF THE CAYMAN
ISLANDS
UNIT

SEE REVERSE FOR
CERTAIN
DEFINITIONS
CUSIP [●]

UNITS CONSISTING OF ONE CLASS A ORDINARY SHARE AND

ONE RIGHT TO RECEIVE ONE-EIGHTH OF ONE CLASS A
ORDINARY SHARE

THIS CERTIFIES THAT

is the owner of

____________Units.

Each Unit (“Unit”) consists of one Class A ordinary share, par value $0.0001 per share, of Timber Road Acquisition Corp., a Cayman Islands exempted company (the “Company”) and one right (“Right”) to receive one-eighth (1/8) of a Class A ordinary share. Every eight Rights entitles the holder thereof to receive one Class A ordinary share upon consummation of the Company’s initial business combination (as defined in the prospectus relating to the Company’s initial public offering (“Prospectus”)). The Class A ordinary shares and Rights comprising the Units represented by this certificate are not transferable separately prior to the fifty-second (52nd) day following the date of the Prospectus (or the immediately following business day if such 52nd day is not a business day), unless Roth Capital Partners, LLC (“Roth”) determines that an earlier date is acceptable, provided that in no event may the Class A ordinary shares and Rights be traded separately until the Company files with the Securities and Exchange Commission (the “SEC”) a current report on Form 8-K which includes an audited balance sheet reflecting the receipt by the Company of the gross proceeds from its initial public offering including the proceeds received by the Company from the exercise of the over-allotment option thereto, if the over-allotment option is exercised. If Roth allows separate trading of the Class A ordinary shares and Rights prior to the 52nd day after the date of the Prospectus, the Company will issue a press release and file a Current Report on Form 8-K with the SEC announcing when such separate trading will begin.

The terms of the Rights are governed by a rights agreement (the “Rights Agreement”), dated as of [●], 2025 between the Company and Continental Stock Transfer & Trust Company, as the rights agent, and are subject to the terms and provisions contained therein, all of which terms and provisions the holder of this certificate consents to by acceptance hereof. Copies of the Rights Agreement are on file at the office of Continental Stock Transfer & Trust Company at 1 State Street, 30th Floor, New York, New York 10004 and are available to any Rights holder on written request and without cost.

This certificate is not valid unless countersigned by the Transfer Agent and Registrar of the Company. Each Unit may be mandatorily split by the Company in connection with the closing of a business combination. Witness the facsimile seal of the Company and the facsimile signatures of its duly authorized officers. This Unit Certificate shall be governed and construed in accordance with the internal laws of the State of New York, without regard to conflicts of laws principles thereof.

[Seal]

By

	[TITLE]	[TITLE]

Timber
Road Acquisition Corp.

The Company will furnish without charge to each shareholder who so requests, a statement of the powers, designations, preferences and relative, participating, optional or other special rights of each class of shares or series thereof of the Company and the qualifications, limitations, or restrictions of such preferences and/or rights.

The following abbreviations, when used in the inscription on the face of this certificate, shall be construed as though they were written out in full according to applicable laws or regulations:

TEN COM -	as tenants in common	UNIF GIFT MIN ACT - _____ Custodian ______
TEN ENT -	as tenants by the entireties	(Cust) (Minor)
JT TEN -	as joint tenants with right of survivorship and not as tenants in common	under Uniform Gifts to Minors Act ______________
(State)

Additional abbreviations may also be used though not in the above list.

For value received, ___________________________ hereby sell(s), assign(s) and transfer(s) unto

PLEASE INSERT SOCIAL SECURITY OR OTHER

IDENTIFYING NUMBER OF ASSIGNEE(S)

(PLEASE PRINT OR TYPEWRITE NAME AND ADDRESS, INCLUDING ZIP CODE, OF ASSIGNEE(S))

	Units

represented by the within Certificate, and do hereby irrevocably constitute and appoint

	Attorney
to transfer the said Units on the books of the within named Company will full power of substitution in the premises.

Dated


Notice:	The signature to this assignment must correspond with the name as written upon the face of the certificate in every particular, without alteration or enlargement or any change whatever.

Signature(s) Guaranteed:

THE SIGNATURE(S) SHOULD BE GUARANTEED BY AN ELIGIBLE GUARANTOR INSTITUTION (BANKS, STOCKBROKERS, SAVINGS AND LOAN ASSOCIATIONS AND CREDIT UNIONS WITH MEMBERSHIP IN AN APPROVED SIGNATURE GUARANTEE MEDALLION PROGRAM, PURSUANT TO S.E.C. RULE 17Ad-15).

The holder of this certificate shall be entitled to receive funds with respect to the underlying Class A ordinary shares from the trust account only in the event of the Company’s liquidation upon failure to consummate a business combination or if the holder seeks to redeem his or her respective Class A ordinary shares underlying the unit upon consummation of such business combination or in connection with certain amendments to the Company’s amended and restated memorandum and articles of association (as defined in the Prospectus). In no other circumstances shall the holder have any right or interest of any kind in or to the trust account.

Timber Road Acquisition Corp S-1